Identifying substances using properties lab answers

6. By discovering answers more quickly using the wealth of physical property information associated with individual substances, chemists can find answers and get back to the lab bench sooner. The purpose of this experiment is to identify the products obtained in the Complete the following table summarizing the general properties of the . What properties in general do covalent-bonded substances have? 2. . Today in lab you will learn how to correctly identify an unknown liquid using the physical properties of solubility, density and boiling point. In addition, they may wish to design new experiments. Groups begin identifying properties of matter. The properties studied are: volatility, melting point, solubility in water, and electrical conductivity. Covalent Compounds Lab C. g 9. While of limited use in the real world due to the huge number of elements out there, it gives you an idea of how this works. Ionic vs. com Answers ? Activity 4/5. 5) What is a meniscus? 6) Can density be used as identification for substances in lab? Why or why not? 7) Which was more accurate, your own lab group data or the class data? Cut and paste for white powders lab - cut out the strips on pg 2 and paste them in order onto pg. The solvent must touch the pointed end of the paper but should not Students will use a key to identify substances based on their properties. ” Reference to elements is most frequent today in the field of chemistry. “Test, Not Taste. 13 Chemists often have to identify the composition of unknown substances. It is part of the General Chemistry Virtual Textbook, a free, online reference textbook for General Chemistry by Stephen Lower of Simon Fraser University. These physical properties can be used to classify substances. Read Chapters 4 and 5 in Campbell Biology (9th Ed. You can use a mineral's properties to determine its identity because the properties are determined by the chemical composition and crystal structure, or the way that the atoms are arranged. Physical No change in substances. #6. Contrast mixtures and substances. Concepts you need to know to be prepared The Classification System of Matter Any sample of matter is either a pure substance or a mixture of pure substances. Since characteristic properties for a given substance never change, they can be used to identify unknown matter Laboratory 28: Properties of Lipids Introduction Lipids are naturally occuring substances that are arbitrarily grouped together on the basis of their insolubility in water (a polar solvent) and solubility in nonpolar solvents. By performing various tests, they are able to identify whether their powder is baking soda, baking powder, citric acid, corn starch, or detergent. The resulting compound has all the properties of a chemical substance and the two elements cannot be separated using normal mechanical processes;  View Lab Report - Lesson 2 - Identifying Substances Using Properties Lab from SNC 1P at A Y Jackson Secondary School. Identifying Organic Compounds Partners_____ Background The foods you eat are made of organic compounds. ABSTRACT In the experiment, there were four different unknown powder substances and three liquids (water, iodine, and vinegar) used to mix with them to determine their identity. Sorting Materials Using Properties 1. This chemistry video tutorial explains how to identify weak electrolytes, strong electrolytes, and nonelectrolytes. Bio 3A Lab: Biologically Important Molecules Page 1 of 11 Each class of these macromolecules has different structures and properties. Using 2 mL portions of the resulting solutions run the Benedict and Seliwano tests. Students will determine hardness, color, luster, streak color, and cleavage using various hands-on testing methods. Students will then answer questions related to the video and record their answers on their lab station sheet. It is designed to help students link chemical computations with authentic laboratory chemistry. The ink used in a note left at a crime scene can be identified through paper chromatography. 5. Chemical no; however, if the answer is yes the types of products that these may be . Students will understand forensics PBL scenario and begin to form an organization system. EXPLORE Identifying Substances How can properties help you identify a substance? PROCEDURE Place some of substance A into one cup and some of substance B into the other cup. 2. At the end of this metals, nonmetals, and metalloids lesson plan, students will be able to compare metals, nonmetals, and metalloids using physical properties such as luster, conductivity, or malleability. As you can see by the tables the first step we took was to find out the acid by using the PH paper. Unlike other substances, when water is heated, much of the thermal energy that is absorbed breaks CHM230 Identification of Unknowns Lab *Adapted from Introduction to Organic Laboratory Techniques by Pavia, Lampman, and Kriz 3rd edition and Organic Chemistry Laboratory Standard and Microscale Experiments by Rodig, Bell, and Clark. White Substance Analysis and Identification Lab Target Audience 9-12 Background and Notes: Chemistry is the study of matter and the changes that occur to matter. This allows substances to be identified using their specific heat. Identification of an Unknown Based on Physical Properties: What Type of . You will determine these properties using a Conductivity Probe. By the study of well-formed examples of individual minerals, the investigation of rocks that typically consist of fine-grained intergrowths of several minerals will be made easier in the succeeding labs. As you know, Purpose: The purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then comparing the results to the values for known substances. Make a table that lists the substances and at least one element in the substance, or fill in the table on the next page. Density = mass/volume. However, the lab can be broken down so just one of the experiments is conducted to show the Law of Conservation of Matter. Physical changes can be tearing, grinding, melting, boiling, dissolving or any change that does not change the chemical identity of the The mass and volume of these two chunks are different (extensive properties), but the color is the same. Chemical properties describe how an element behaves during a chemical reaction. Learn how to read a structural formula for several carbohydrates 3. Over 400 Gizmos aligned to the latest standards help educators bring powerful new learning experiences to the classroom. Mystery Powders Activity. What is the color, form, and odor of sugar? 2. Identification of Substances 2 Pre-lab by Physical Properties Questions Before beginning this experiment in the laboratory, you should be able to answer the following questions. Learn vocabulary, terms, and more with flashcards, games, and other study tools. combination of substances not Geology Laboratory: Mineral Properties Revised on 8/27/2012 Page 3 of 13 Vitreous luster-is like that of glass, shiny and translucent to transparent. Physical and chemical properties are the key to identifying these different substances. Identifying Substances Using Properties Case Study Identifying Mystery Gases Chemical Symbols and Formulas E. k 11. The purpose of this experiment was to identify the unknown compound. What is the color, form, and odor of mineral oil (Unknown B liquid)? 5. You will devise a plan for identifying an unknown from several substances, and then carry out your plan to identify the unknown. The also do similar tests on the materials found on a suspect’s skin or clothing. Red cabbage juice contains chemicals called anthocyanins. Properties Homework (see criteria below) You will be asked to identify substances as “pure substances”, “heterogeneous”, or “homogeneous” of the knowledge of pure substances and mixtures as it relates to air purification, using fill in the blanks. These patterns in properties are then linked to the wave-mechanics concept of IONIC OR COVALENT LAB The type of bonds that hold their atoms together can classify compounds. 78g/mL) of the liquid using a small 10 mL graduated cylinder with a margen of error (circle the answer) s i sl. Record your results. PROPERTIES AND CHANGES PHYSICAL PROPERTY CHEMICAL PROPERTY. Physical changes. Human pH Scale: On separate pieces of paper, write the names of the different substances you tested. QuickLAB Foam in a Cup 91 1. Conclusion: In this lab we were required to find the eight unknown substances given to us. 1x Elements can also be differentiated by chemical properties. physical property is the amount of energy each gram of a substance will absorb. write an abstract for a lab report. (4) • Some properties of objects change and some properties don't change. ) Investigate the properties of rocks and minerals through a rockin' hands-on activity. • How properties can help you identify substances • How properties of substances can be used to separate substances KEY CONCEPT Properties are used to identify substances. Define chemical change and list several indications that a chemical change has taken place. How do we know that it is unusual? Let’s compare water to some other substances and see what we can find, using the data table below. Solution Physical properties of matter are characteristics of substances that relate to the structure of possible to measure using the available materials. 3. 3 In this experiment, you will discover some properties of strong electrolytes, weak electrolytes, and non-electrolytes by observing the behavior of these substances in aqueous solutions. The physical properties of a substance such as flame color, crystal structure, solubility, conductivity and melting point of a substance tell us a lot about the type of bonding in a compound. Hydrolysis of a Polysaccharide 1. . Classify matter according to its state, composition, and properties. No unexpected color change, temperature change or gas given off. This lab contains material copywritten by Classifying Substances by Their Physical Properties. If the substances While there are qualitative analysis methods used to identify covalent molecules, most covalent compounds can be identified and distinguished from each other using physical properties, such as refractive index and melting point. Substances are added to the DSL using a unique substance identifier (e. calculate the specific heat of the substance using your mass and temperature  Heterogeneous/Homogeneous Experiment (a copy may be found here). Aqueous solutions can be described by a number of properties. Distinguishing Between Ionic and Covalent Compounds Lab Purpose: Use physical properties to distinguish between ionic and molecular compounds. Skill Practice Safety in the Science Lab 93 chemical properties. A short quiz Lab 10. 676 J/Kg/oC. Let's start investigating a number of common substances to find out which are ionic and which are molecular. By conducting some tests, you will be able to compare the properties of ionic and molecular compounds. Investigating the composition and properties of minerals is the main focus of this lab. Visit the Oklahoma Community College website Biology Labs Online's Organic Molecules website. Aldehydes and Ketones are organic compounds consisting of the carbonyl functional group. Using properties of known substances to deduce the identity of unknown substances. color, luster, texture and transparency, there are other properties that make the substance unique including density, chemical reaction to different substances- physical and chemical changes; and “fingerprints” of the substance using a spectroscopy. A specific combination of properties is unique to a given substance, so it is possible to identify most substances just by careful determination of several properties. Physical and Chemical Changes. • Objects, properties, and events stay the same or change in similar ways. 1. Keep an eye on the level of the water bath, and add more water if the level gets too low. have definite shapes and definite volumes. What is the density of the unknown? 3. Density is a measure of the amount of mass in a certain volume. In practice recorded in the lab notebook as, for example, MP ( compound A) . The goal of this lab is for you to discover some of the properties of ionic compounds. 2) Observe each of the properties of the 5 different unknown substances and record your observations. This lab is intended to introduce students to the concepts of acids, bases and pH using household chemicals and products. We will be using density and specific heat (also known as "heat capacity" or "specific heat capacity"). A 1. Chemistry: Determine the Identity of an Unknown Chemical Substance. Therefore, keep in mind that each of the chemical tests that are discussed below can be done with a few drops of solution. Introduction: The Grade 5 Physical Science Unit focuses on matter and its properties. Atoms are held together by covalent bonds in molecular compounds. Physical properties, such as hardness and boiling point, and physical changes, such as melting or freezing, do not involve a change in the composition of matter. A pure substance cannot be separated into 2 or more substances by physical means such as crystallization or distillation nor by mechanical means such as sifting, filtering, or using a magnet. Every metal has a unique set of properties. Make Up: Ionic Compounds Properties Lab 2017-2018 The goal of this lab is for you to discover some of the properties of ionic compounds. INTRODUCTION Every substance has a unique set of properties that allow us to differentiate one from another. When they dissolve in water, ionic compounds break apart into ions. Use your notes and Chapter 9 for further information. Metals are also malleable and ductile. Assume that you have to identify an unknown metal. For example, lipids (composed of fatty acids) have many C-H bonds and relatively little oxygen, while proteins (composed of amino acids) have amino groups (-NH3+) and carboxyl (-COOH) groups. health and safety - Hazard identification and elimination and risk assessment and and described using general terms or mathematically (e. Bring personal protective gear: lab coat and closed-toe shoes. Identifying White Powders Using Properties - Cut and Paste HO Physical Properties of Unknowns - Intro lab HO Take up if not done already: 1) Complete lab analysis questions #1-6 at the bottom of the cut and paste section from today's lab. 3 Experimental Set up your notebook as usual, recording the title, objective and procedure. 1w Elements can be differentiated by physical properties. Record the properties of the substances in the observation table below. TTU/HHMI at CISER. Gizmos are interactive math and science simulations for grades 3-12. unit 3 Solutions, Acids, and Bases Solutions, Acids, and Bases Solutions, especially of the liquid variety, are everywhere. You may come across a non-aqueous solution using a non-aqueous solvent like alcohol or hexane. The cards ask students to make observations and write their findings on their lab sheet. a. You can perform chemical tests to learn what foods contain carbohydrates, lipids, and/or proteins. Neutralize the acid with 10% NaOH solution (15-20 drops), using red litmus paper as an indicator. Equipment: The goal of this lab is to identify all five of the unknown white powders you are given. Ask for volunteers from the class to come up to the front of the room, and give each one of the pieces of paper. The chromatogram showing the components of the ink used in the note can be compared to chromatograms of known inks hopefully identifying the type and brand of ink used providing a clue to the crime. this is more scientific than using any traditional use of plant then it is easy for us to conduct an experiment . You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. WATCH IT! At this station, students will be watching a three-minute video explaining the differences between elements, compounds, and mixtures. (Do not touch nor smell the chemicals. !! Background: Elements are generally divided into 3 main groups- metals, nonmetals and metalloids. Chapter 5 Organic Compounds Identifying Monosacchrides, Starch, Proteins, and Lipids Lab # 5 Organic Compounds Note to Teacher: Answers appear in italics along with suggestions and specific teaching information. Experiment: Reactions of alkanes, alkenes, and cycloalkenes* Purpose: To investigate the physical properties, solubility, and density of some hydrocarbon. They use various properties including hardness, Plant Traveling Lab. 13 Nov 2009 Identifying Unknown Substances Physical Science Lab Answer: One reaction does not give us enough information to differentiate between  while identifying an unknown chemical using physical and chemical properties. Elements and compounds are pure substances. They are good conductors of electricity and heat. Procedure: 1) Density determination An Introduction to Functional Groups in Organic Molecules* OUTCOMES After completing this experiment, the student should be able to: perform functional group identification tests. You will need to develop your own procedure for this lab by reading the material given in this hand out. A solution is the same, or uniform, throughout which  Solids, liquids, gases, plasmas, and Bose-Einstein condensates (BEC) are different states of matter that have different physical properties. Using ideas from the students, the teacher will create a list of physical and chemical properties "mystery" substances using their unique physical and chemical properties. If a physical change occurs, the physical properties of a substance will change, but its The identification of oxygen in the 18th century by Swedish chemist Carl Wilhelm  Read 12 answers by scientists with 12 recommendations from their What are the different experiments we can conduct to check medicinal properties of any fractionated by using different column chromatography. indefinite shapes and indefinite volumes. in this set (27) List some physical properties that can be used to identify unknown substances of Substances by 2) Observe each of the properties of the 5 different unknown substances and record your observations. Abstract. A Biuret Reagent is chemical test used to detect peptide bonds in a substance. disulfide (CS2). Which compounds melted most easily? Using their determined bond types explain why some substances melt easily and the others do not melt at all. Then use your answers to develop simple rules for identifying carbohydrates, lipids, proteins, and nucleic acids. It is used in the sequencing of DNA and RNA. What two substances are in the mixture? 3. Density is a basic physical property of a homogeneous substance; it is an intensive property, which means it depends only on the substance's composition and does not vary with size or amount. This physical property is often used to identify and classify substances. Thus, in the lab rotation today, you must "channel their inner scientist" and do the same! At each lab station you must determine if the reaction observed is a chemical or physical reaction. ” Using Properties to Identify and Separate Substances What is a property? How do I determine the identity of a substance? How do I separate a mixture into its components? Prelab Spend 5 minutes doing the following activity. In today’s experiments we will explore membrane transport processes, focusing on passive transport, specifically diffusion of molecules through various types of matter and across semipermeable membranes. All fresh water in streams, rivers, and lakes, salt water in the oceans, and even the rain that falls from the sky are examples of solutions. Lab Techniques for Semi-Micro Qualitative Analysis to help science teachers identify hazardous substances that may be used in school laboratories and provide an inventory of these substances. (2) Drops on a Penny lab Introduction - I pass out the lab materials and safety goggles. Changes in the state of the matter can also be a physical change. To compare the chemical reactivity of an alkane, an alkene, and an aromatic compound. Identify the three main types of carbohydrates by using chemical tests 5. Answer the questions. Hint: Think about changes in texture, shape, size, color, odor, volume, mass, weight, and density. 5 Identifying Substances Using Density-PDF. Inquiry Labs in the High School Classroom Research Paper Rationale When we both began this journey to education we assumed that it would be easy to find materials to teach high school science… and it was. Assign a notetaker. But, you cannot see all mineral properties. Introduce PBL scenario. What is the color, form, and odor of citric acid? 4. After completing the lab to find the optimum mole ratio of NaClO and Na2S2O3 using the method of continuous variations, it was discovered based on the data that this ratio occured when there was 40 mL of NaClO and 10 mL of Na2S2O3 in the mixture, meaning there is a 4:1 mole ratio, as this produced a temperature change of 19 degrees Celsius from the originial starting temperature of 22 degrees Students will begin this inquiry-based lesson by accessing their prior knowledge about the distinguishing characteristics of different substances. Lab 1 - Density Determinations and Various Methods to Measure Volume Goal and Overview This lab provides an introduction to the concept and applications of density measurements. h 10. Aqueous means a solution in water. Identifying Four Unknown Powder Substances I. What is the difference between separation and identification of substances? 3. happen when the chemical structure of . In the qualitative analysis procedure, the chemical properties of an unknown substance are determined by systematically reacting the unknown with a number of different reagents. These ions move about among the water molecules bumping into the other ions and molecules in the solution. Lastly, students will carry out the investigation they planned with the aim of identifying "mystery" substances using their unique physical and chemical properties. Virtual Lab: Determine the mystery elements by their properties. read online for free. In a very simple example, this is something you can do in a simple lab using the “flame test”. Introduction: Chemical compounds are combinations of atoms held together by chemical bonds. Suppose that you have a mixture of two substances. Experiment 1 What's the Matter. substance 3. What general properties do ionic-bonded substances have? 3. Be sure to include 3 Pure substances may be characterized by their physical and chemical properties. that has the ability to cause harm or adverse health effect to a person or property. NOTE: You can also give the students a chance to try this demo again after they have completed the penny lab. Identification of an Unknown Based on Physical Properties: What Type of Solution Is the Unknown Liquid? Introduction . Formulate hypotheses BEFORE LAB regarding the biochemical composition of the common foods that you will test in lab. lamission. Since substances act different in water, it is one way to identify substances. It is a guided inquiry in which students will be testing different physical properties, such as melting point, or conductivity to help them determine whether the compounds are ionic or molecular. Phase changes are s i' point is the changes. In addition, you must cite properties that change as a result of the reaction. d. Using the 6mL syringe, dispense 5 mL of chromatography solvent in the test tube. a 5. e. What is the difference between chemical and physical properties? 5. ) 2. Explain how you reached these conclusions. Read and or download the questions listed below. Data Table 1: Physical Properties of Some Substances Substance Formula Molar mass, grams State of matter at normal room conditions Color Specific Heat Covalent and Ionic Properties Lab. Remember that glass can be almost any color, including black, so don't be fooled by the color. Report No 4: Identification of Liquid Substances Through Their Physical Properties Substances can be identified through their physical properties, such as solubility, melting point, boiling point, density, electrical and magnetic properties, physical state, and a variety of other physical properties. Substances assessed using the ecological risk classification of The Low Human Health Hazard Potential Approach is used to identify substances with low inherent repeat-dose toxicity. In a chemical change the properties of the new substances are different from the original, the particles are different and the number of particles can change. 6 Identifying Mystery Gases - Lab - WORD. properties describe how a substance interacts with other substances. Carefully lower the paper strip into the test tube and secure the cork in the top. There will be 15 white/clear powders all together and I need ways to figure out which one is which. www. point in identifying liquids and solids substances. Does a substance change As a chemistry tutor in Cambridge, I can help break down how to approach a chemistry lab. density (0. Physical properties of substances, such as density, conductivity, malleability, solubility, and hardness, differ among elements. PHYSICAL PROPERTIES: 1. Determination of chemical properties results in the change of the identity of the substance. The purpose of this experiment is to identify an unknown substance chosen from the attached list. Experiment: Identification of Unknowns* Identification of Unknown Organic Compounds Introduction The identification and characterization of the structures of unknown substances are an important part of organic chemistry. The task for our lab was to determine the density of water and compare our recordings to the actual density of water listed in our lab packet. Use models to construct the main types of carbohydrates 4. The subunits of macromolecules are held together with covalent bonds, and have different structures and properties. ¾ Twizzler Lab (Identifying the Physical Properties of a Twizzler) o Students will take notes over Chemical and Physical Properties in the information section of the Twizzler lab ¾ Students will complete a worksheet over chemical and physical properties Day 5 ¾ Catch-Up Day Day 6 ¾ EQ: What Happens To A Substance When It Changes? Lab #1 Measurement of Physical Properties Introduction Just as people can be identified by their appearance and their behavior, substances are described and identified by their physical (appearance) and chemical (behavior) properties. Identification and reaction of alcohols and phenol lab report . Also, a dark piece of glass may appear to be opaque if it is thick enough. In either event, the halogen that remains after the halogen and halide are mixed is the less active halogen. Following are descriptions of the two types of properties: Chemical properties: These properties enable a substance to change into a brand-new substance, and they describe how a substance reacts with other substances. Then we were to find the density of an unknown liquid and find out what the substance was by matching its density with densities of substances listed in our packet. DISCUSSION During this lab activity students will use their knowledge of the physical properties of minerals to investigate and describe seven common minerals including quartz, feldspar, biotite mica, calcite, pyrite, graphite, and talc. Chromatography can be described as a broad class of biochemical techniques in which a mixture of substances can be separated by various properties of which include charge, size, hydrophobicity, non-covalent binding affinities or some other properties by allowing the mixture to partition between a moving phase and a stationary phase. Water has a high heat of vaporization - the energy required to convert liquid water to a gas. Websites for "How can Physical Properties Be Used to Identify Matter?" Results: 70 sites match your search. The LAB-AIDS Science Lab Notebook was designed with “Best Practices” in mind. These materials are often complex mixtures, such as soil, which contain many substances. observed with senses 1. Identifying organic compounds food lab (1) 1. Purpose: In this lab we will be using the physical properties of solutions to determine the culprit in a crime. The use of a science journal or notebook is strongly recommended for all science classes. 2010 4 Separation of Pigments: 1. • Well Plates. Using a hot plate, heat about 400 mL of water to a rolling boil in a 600 mL or 800 mL beaker. Problem. A journal not only models the way scientists work but it helps to develop and reinforce students’ science learning and literacy skills. For example, pure water boils at 100°C; however, if contaminated with salts or another liquid, the boiling point will not be 100°C. Using the patterns established in this experiment and the information in your notes, predict the properties – odor, appearance, solubility in water, conductivity in solution, and high/low melting point – of . To study the physical and chemical properties of alcohol and phenol . A stainless steel screw and an iron nail will be used for the electrodes. (The lab topical outline should reflect the activities in lab. Lab Report Identifying Unknown Substances by Characteristic Properties Purpose: To identify the unknown substance by characteristic properties. All substances have distinct physical and chemical properties, and may undergo physical or chemical changes. Chemical properties include decomposition by heating, and reactions of the substance with water, oxygen, acids, and bases. 4. Lab 2: “Test, Not Taste” 23 Lab 2. The powders are are the following : sodium acetate, sodium chloride, sodium hydrogen carbonate, sodium carbonate, lithium chloride, potassium chloride, calcium nitrate, calcium sulfate, calcium carbonate, cornstarch, glucose, sucrose systematic qualitative analysis scheme, each substance present is separated from the other substances. The tests that were done to determine the identity of the compound include qualitative solubility tests, quantitative solubility tests, measuring solution conductivity, anion and cation test, flame test, and formation of precipitate. The red cabbage juice that will be prepared in this lab is more of a universal indicator, though it will be used primarily to classify substances as acidic, basic, or neutral. Start studying Identification of Substances by Physical Properties (2). Utilize the scientific process to determine the physical and chemical properties of a variety of common substances. 73 cm'. H. By understanding how different substances react with solvents and with each other, it is possible to deduce their identity by performing systematic tests on them. 10 M solutions: CuSO4, KNO3, NaCl, AgNO3, NaOH. Chemistry Quiz - all to date. They are typically conducted as part of a synthesis and are frequently of two types: 1. Assessment AP LAB: Identifying Types of Substances In this lab you will have 5 different types of substances: polar covalent, nonpolar covalent, metallic, ionic and network covalent. Physical properties are those that can be Some physical properties that can be observed quantitatively are melting point, boiling point, solubility, viscosity, density, and refractive index. determined without changing matter reacts with something else. Discuss student answers to questions on the Measuring pH of Common Substances Worksheet. Brainstorm facts, ideas and learning issues with students. , a probability or a  What is a solution? A solution is a specific type of mixture where one substance is dissolved into another. You need to do simple tests to determine some properties, such as how hard the mineral is. lab begins. 1) What is the purpose of this lab? 2) What physical properties, other than specific heat, could you use to help you identify the metal samples? 3) Why is water an excellent material to use in the calorimeter? 4) What substance lost heat in this experiment? 5) What substance gained heat in this experiment? 80 CH104 Lab 6: Chemical Reactions (F15) Many metals will react with acids (sources of H+) to form hydrogen gas (H 2). The aim of this experiment was to identify which functional groups the various chemicals and unknown substances belonged to using the different reaction tests. Apply the law of conservation of mass to chemical reactions. Analysis Questions - Analyze and Communicate a to f (all answers written using FULL SENTENCE answers - where applicable) Conclusion - 'answers the problem above' Wednesday, September 28, 2011. These changes can be chemical or physical. , osmosis, diffusion). The densities of brass and aluminum will be calculated from mass and volume measurements. Lab Manual, Ch 5, Ex 5-1- Diffusion Chemistry 201 Qualitative Analysis Introduction General comments: It is always a good idea to use as few chemicals as possible; it makes sense both from consideration of lab safety and chemical waste disposal. c 6. Rinse and dry the spot plate and clean up rest of materials. A chemical property is the ability or tendency of a substance to change into another substance. Chapter 4 Lab: Identifying Organic Compounds 50 Points (using a test tube holder) and place them back in the next to any substances that test positive for Lab: Identifying Elements, Compounds, and Mixtures Directions: Read through the review chart below and answer the pre-lab questions. The separation of the components of a mixture is a problem frequently encountered in chemistry. 9. 20 g sample of an unknown has a volume of 1. Objectives Identity of substances change. identify an unknown organic molecule based on its functional group. These problems are minimized by using small amounts of the liquids. b 7. Physical Changes vs Chemical Changes Lab altered the nature of paper and the smaller sections do not have different properties. Part A. A sample solution may contain either, both or neither of the following ions: CO 32– and SO 42–. The chart on the right lists the densities of Students will investigate properties of solid substances. How did you determine the correct answer?Now, give the students a mystery powder made up using at least two of the four pure subtances. 7. 1 EXPERIENCING CHEMISTRY ©2006 OMSI Mystery Powders Visitors choose one of five unidentified powders. Identification of Liquid Substances Through Their Physical Properties lab report LATTC. When working with this Lab Report file, remember to save often. The main purpose was to determine the reactions of Aldehydes and Ketones. Observations: Substances Properties Sodium properties include color, odor, taste, density, melting point, boiling point, conductivity, and hardness. • Properties of matter can be measured using tools such as rulers, balances, graduated cylinder, displacement, and thermometers. LAB: ELEMENTS AND THEIR PROPERTIES Throughout the ages of history, philosophers and scientists have talked about “the elements. Heat Capacity of 1 Kg from data collected: Heat Capacity/Mass = 371/0. Basma Bulling March 2, 2016 Identifying Unknown Substances from Start studying Identifying Unknown Substances from Characteristic Properties Lab. While the distinction between physical and chemical change is a useful one it should be seen as more of a continuum. Then, rotate through the stations, identifying each substance as an element, compound, or mixture. Chemical reaction, a process in which one or more substances, the reactants, are converted Substances are either chemical elements or compounds. In this investigation, you will determine the identities of five unknown substances using your laboratory skills and knowledge of physical and chemical properties. • Lab Handout (see attached) • Dropper bottles of each of the following 0. Dispose of the contents of the test tubes in the waste bottle labeled "E26 Carbohydrate Waste". All elements has certain properties. Forming and Naming Ionic Compounds Lab. Performance Expectation(s): 5-PS1-3 Make observations and measurements to identify materials based on their properties. Bring four different types of food to lab for testing. Students design their own set of experiments to determine the best suita ble indicator to test the pH of the various substances. g. The properties that we will be concerned with are: • water solubility of organic solvents • density of organic solvents • boiling points of organic solvents • melting points of organic solids IDENTIFYING ACIDS AND BASES LAB INTRODUCTION: Water molecules can react to form ions. View Lab Report - CHEM 1411 Lab Report Identification of Substances by Physical Properties. matter will be changed into a new LAB 2: MINERAL PROPERTIES AND IDENTIFICATION O BJECTIVES: 1) to become familiar with the properties important in identifying minerals; 2) to learn how to identify the common rock-forming minerals. Solubility . These clues about mineral formation lead to a better understanding of Earth's history, structure, and processes. Iron of knife forms rust 4. Place the test tube in the test tube rack. LAB: PROPERTIES OF IONIC COMPOUNDS (50pts) Introduction. The problem or question that the experiment will attempt to answer  12 May 1981 the Regulations and identify the information requirements. Answer in the space provided. Choose five items or substances that can be put through a physical change. unit test for chemistry on monday february 29th!! see unit outline for what is covered Properties of Water Station Lab: Station 3 SB1. b. Scientific Principles: 2) What was the unit of mass used in this lab? 3) What was the unit of volume used in this lab? 4) Describe how water displacement works. Qualitative Chemistry: Precipitation of Cations and Anions Introduction Qualitative chemistry is the subdivision of chemistry concerned with identifying substances. Density Practice: Worksheet #1 Calculate density, and identify substances using a density chart. Color, density, conductivity, and pH are a few examples of properties that can be used to characterize solutions. For example, in the case of physical state, a substance can be either a solid Identification of an Unknown Substance. have indefinite shapes and definite volumes. Report to class. Understanding Solutions Guided Reading and Study Use Target Reading Skills Sample answers: a. Introduction to the Physical Properties of Matter Objective: The objective of this lab is to identify different classes of matter based on physical properties. Both are characteristics of substances. Chemical reactions can be reversed but this can be difficult in practice. s  After watching this video, you will be able to explain what physical properties are and use them to classify some common substances. Differentiate between physical and chemical changes and between physical and chemical properties. It provides a deeper understanding of the physical properties of concrete. e 4. SNC 1P Name: _ Lab #1: Exploring  In this experiment, we will use three properties to identify a liquid substance - solubility, density and boiling point. Lab, Exp. Identifying Substances Using Properties Lab write-up due and MUST INCLUDE : Virtual Labs Created by Glencoe. Virtual Macromolecule Labs. to us. An atom is the smallest particle of an element that still has all the properties of the element. PROBLEM . In this scenario, you are hired by your local government to help set up a plant that recycles waste cans. For example, lipids made of fatty acids have many C-H bonds and relatively little oxygen, while proteins made of amino acids have amino groups (-NH 2) and carboxyl (-COOH PHYSICAL PROPERTIES LAB INTRODUCTION An old riddle asks “Which is heavier, a pound of feathers or a pound of lead?” The question is nonsensical, of course, since a pound of feathers and a pound of lead both weigh the same, one pound. If it is a mixture, be sure to include whether it is homogeneous or heterogeneous. Strong electrolytes including strong acids and bases as well as soluble ionic o Conservation of Matter Lab [“You Do” or “We Do”] [Differentiation Option: The guided practice lab and the design an experiment lab can be done as described in the directions. ), the spectra typically must be supplemented with Virtual Lab . F. NOTE: Introduction Finding Patterns – Organizing Chemical Knowledge on the Periodic Table Unit Framework Annotation This unit, Finding Patterns, takes an inquiry approach to understanding the patterns of properties that exist among the elements. PHYSICAL AND CHEMICAL . pH is a measure of the acidity of a solution. Each of these powders can be superficially described as a “dry white powder”, but they have different chemical and physical properties. melting point is a physical property of a solid and can be used to help identify a substance. After completing the Preliminary Activity, you will first use reference sources to find out more about physical properties of pure substances and how to determine physical properties. Experimental The LAB-AIDS Science Lab Notebook. Educational Goals: Students will be able to… EXPERIMENT 2: Separation of the Components of a Mixture Materials: Evaporating dish (2) Watch Glass Magnet Hot Plate Unknown mixture Objective: To learn the use of physical properties such as solubility, density, boiling point, and melting point to identify liquids and solids substances. ) 3) Pick up each substance, using the tip of your wooden splint and place each numbered sample, into a different well of the spot plate. These chemical bonds are of two basic types- ionic and covalent. Carefully pour the waste material into the waste beaker. View Lab Report - Identifying Unknown Substances from Characteristic Properties Lab from CHEM 104 at Hopkinsville Community College. f 2. Student will develop hypotheses, make observations, and draw conclusions about what each powder is and the physical and chemical reactions that occur when heat, water, iodine, and vinegar are added to each substance. Although complicated machinery and equipment may be necessary it is important to know that both physical and chemical properties of substances are used in the discovery process. Learners test rocks for various properties and, using a guide, attempt to identify different samples. Additional Work. Students will apply their knowledge of properties to the usability of the substance to create a new object. Answering the questions below will help you practice using what you know about macromolecules. s s i sl. carbon. Describe how the concept of density relates to an object's mass and volume. This reaction can be summarized by a chemical equation in which double arrows are used to show that the reaction can occur in either direction. In this lab we will be using lab techniques and basic chemical concepts to identify an unknown metal. GEOLOGY 335 LAB -- MINERAL IDENTIFICATION REVIEW This lab is a review exercise on the techniques of mineral identification in hand specimen. indicates how a substance. By predetermining what the particular reaction will produce if a specific ion is present, the ions that actually are in the solution can be identified. j 12. Virtual Lab: Instructions: Copy the Observation chart below, complete the "Virtual Experiments" and record your observations on the chart. )--Training in fundamental laboratory safety and waste disposal and familiarization with laboratory equipment and glassware-Performing metric measurements of substances-Identifying and describing physical properties-Separating components of a mixture by physical means Matter––Properties and Changes Reviewing Vocabulary 1. Then a confirmatory test is used to prove that the isolated substance is the expected one. When samples are heated over a Bunsen burner, they turn different colors, reflecting their spectra. The heated metal can then be placed into a sample of water for which the volume (and therefore mass since 1mL=1g) and temperature are known. Your argument must include a claim, which is your answer to the guiding question. docx from CHEM 1412 at Tarrant County College. In the first part of this lab you will investigate how ionically bonded and covalently bonded substances behave differently in their conduction of electricity. The Scientific Method Using Mystery Powders Gail Gavin Chicago High School For Agricultural Sciences 3807 West 111th Street Chicago IL 60655 (312) 535-2500 Objectives: The 6th grade student will be able to: 1. INTRODUCTION Elements and compounds are pure substances Substances and Mixtures:Separating a Mixture into Its Components EXPERIMENTAL TASK To separate a mixture of calcium carbonate, iron and sodium chloride into its component substances using physical means only, and determine the quantitative composition (in percent by mass) of the mixture. Lab 10. A physical property can be observed without changing the composition of the substance. Water can become ice and can turn to vapor, but it still has its original properties of water (H2O). Separating Substances . rials will include the substances to test, the indi-cators to do the testing, and test tubes and bottles to hold the substances. Solids are often hard,  Element Neon (Ne), Group 18, Atomic Number 10, p-block, Mass 20. LAB REPORTS FOR PHYSICAL OPERATIONS, OR TECHNIQUE EXPERIMENTS This type of report refers to lab work whose main objective is to learn, demonstrate, or perform a physical operation. They are to test this mixture using the procedures they used on the pure substances. to chemical substances occur when the physical appearance and structure of a substance change but the chemical structure does not. Lipids include a wide variety of di erent substances, but are commonly Lab Experiment 6 : Chemical and Physical Properties Essay 1254 Words Jan 30, 2012 6 Pages Lab Experiment 6 : Chemical and Physical Properties Lab Experiment 6 : Chemical and Physical Properties Purpose: The purpose of this lab is to test substances and to determine the physical and chemical properties of substances. What general properties do metallic-bonded substances have? 4. You blow dry your wet hair. To use physical and chemical properties to identify an unknown. Chehbouni Saturday, September 24, I have to write a lab report about identifying substances using properties, and I don't have a clue how to write a lab report! Can anyone help, please? FORENSICS LAB: USING PROPERTIES TO IDENTIFY MATERIALS Forensic chemists test the physical and chemical properties of materials found at a crime scene. Explain why changing an object's mass or volume does not affect its density (ie, understand density as an intensive property). In an anodizing apparatus, the water 2 Ask if there were any surprises. and then redo it using a fresh sample, raising the temperature at about  ECHA has developed a four step approach to successful substance identification. Materials: * 30g white substance * thermometer * 40mL water * 4 evaporating dishes * stirring rod * balance * bunsen burner * graph paper * ring stand * pencil In this fascinating and fun physical science lab activity, students will identify four unknown mystery substances (baking powder, baking soda, powdered sugar, and cornstarch) by observing how the substances react with vinegar and iodine. List five physical properties. (Careful, this flowchart is much more complex than our lab requires and often can make it more difficult to form conclusions from your solubility data. Sources, facts, uses, scarcity (SRI), podcasts, alchemical symbols, videos and images. Remember that A chemical substance is a form of matter having constant chemical composition and Therefore, although the exact chemical identity is unknown, identification can be . Each substance can be categorized based on properties such as melting point and conductivity. i 8. When do ionic substances react to form a product? What are the names and formulas for these products? Introduction. The investigative question for the Unknown Substance Lab was: Is it possible to identify the unknown substance using only physical tests? The purpose of the experiment was to broaden and deepen students understanding of conducting a lab and writing a formal lab report. Identifying Solids You will design and carry out an investigation using the physical properties of several substances to identify the type of solid. Featured Products Exploring Matter: Chemistry Demonstrations In this issue of CoolStuff, we'll once again welcome guest author Patty Carlson. Chemical Identity of substances change. Why are chemical bonds important? The type of chemical bond that occurs in a molecule or substance in part defines its properties. glencoe. Lab #3 - Membrane Transport Lecture Notes. Chapter 2 Properties of Matter Investigation 2A identifying each change you Evaluating What evidence was there that new substances formed Download Grade 5 Physical Science: Chemistry & Matter - Introduction and Conceptual Flow Narrative PDF Grade 5 Physical Science: Chemistry & Matter Introduction and Conceptual Flow Narrative. At New Trier High School, Patty is known for her ability to make chemistry come alive. 8. Using a wooden splint, scoop a small sample of the unknown substance into two wells of a spot tray. It is usually expressed in grams per cubic centimeters, or g/cm3. Define physical change and list several common physical changes. We were able to figure out the substances by taking steps and figuring out the certain substances. If you grind some pure iron (Fe) up until it is in small pieces and then bring a magnet close to the pieces, all the pieces will be attracted to the magnet. d 3. In this lab you will determine the density different substances (two unknown liquids and an unknown solid) by measuring the mass and volume of each substance as precisely and accurately as possible. Ions are held together by ionic bonds in ionic compounds. Physical properties are those than can be studied without attempting to change the substance into Start studying All Pre-Lab Questions. To begin the lab experiment, a solution containing four cations is analyzed using the techniques for qualitative analysis of cations. Each lesson is designed using the 5E mymission. Once there carefully read and follow instructions to test substances for the These macromolecules are always made of smaller subunits. EXPERIMENT: Mystery Powders Operating Guide UNIT 7 CRIME SCENE CHEMISTRY U7. The specific heat capacity of a solid or liquid is defined as the quantity of heat required to change the temperature of a unit mass of a substance through a unit change in temperature. By following these steps and our advice, it will help you to get your substance  Solubility is a chemical property referring to the ability for a given substance, the One approach, using 'brute force' simulations, requires long computing times. Qualitative Analysis Lab Report Organic Chemistry Laboratory II ABSTRACT: The purpose of this lab was to separate and purify two unknown compounds, one solid and one liquid, from an ethereal solution using the techniques of chemically active extraction, vacuum filtration, simple distillation, and recrystallization. You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. For studies of physical-chemical properties, GLP compliance is not mandatory. H2O H+ + OH- (water hydrogen ion + hydroxide ion) How to Identify Chemicals in Solution: Test Methods & Materials reactants are the substances that are about to undergo a chemical reaction, whereas products are the result from the chemical CHEM 139 Lab Guide Page 2 Experiment 9 9. Activity/Lab Answers: Identifying Elements, Compounds and Mixtures 1. Evaluate the reliability of measured and calculated quantities and report those values using standard SI units, rules of significant figures and rules of scientific notation. Properties of Ionic and Molecular Substances Lab Properties of the Pure Substance, Ionic, molecular or? Lab: Refraction of Light- Air into Glass Answers. Explain the impact of water on life processes (i. In this classroom guided inquiry lesson, students will complete a serious of tests using five different mystery powders. Explain how objects of similar mass can have differing volume, and how objects of similar volume can have differing mass. properties of different substances are similar, i. Draw the flow-chart on page 38 Addison Wesley Chemistry on this sheet below Matter Substance with definite composition or mixtures with variable composition Substance may be an element or compound ( 2 or more elements) 3. You cannot tell if a compound is ionic or covalent simply by looking at a sample of it Assistance in analyzing the results from your solubility tests can be found in the solubility flowchart given in Fieser and Williamson on page 606. The mixture turns black when mixed with iodine and bubbles when mixed with vinegar. Most tests at this level are done on soluble substances so that you can dissolve the substance in water and carry out tests on the aqueous solution. Students will learn about properties of liquids and solids. Johannesson Experiment 3 Introduction to Density INTRODUCTION The purpose of this experiment is to understand the meaning and significance of the density of a substance. Sometimes you have to observe more than one to identify an unknown material. and boiling points do not depend on the amount of the material, so they are good properties for identifying unknown substances. In this experiment you will find how these properties vary in ionic and covalently bonded substances. Although it is often possible to establish the structure of a compound on the basis of spectra alone (IR, NMR, etc. Identifying Matter Using Physical Properties 1. the toxicokinetic properties of the substance or moiety, and the use pattern of the  General examples include any substance, material, process, practice, etc. Explain how you could determine the identity of the ions in the solution using the solubility data you collected in the experiment. What are two reasons why density is a useful physical property for identifying substances? Which piece of lab equipment would be least useful in finding the precise density of an unknown Physical Properties of Organic Compounds Introduction In this lab, we will investigate how to measure the physical properties of organic compounds. A low resistivity indicates a material that readily www. Table Of Contents UNIT 1: MATTER. Nevertheless, there is clearly something different about a small lead brick and a Lab #2 PHYSICAL SEPARATION TECHNIQUES Introduction When two or more substances, that do not react chemically, are blended together, the result is a mixture in which each component retains its individual identity and properties. All of the Grade 5 California Science Content Standards for Physical Using their knowledge of the relationship between chemical bonding type and the properties of substances, they will determine the identity of mystery solids. Purpose: In this lab you will examine the properties of ionic compounds and covalent compounds. For this reason, it is a good Pre Lab and Post Lab Questions. The experiment determined that Powder A was corn starch because of the chemical indication of Lab 4 Experiment 1: Physical and Chemical Properties. Ionic or Covalent Bonding Lab Purpose: Some properties may be useful to predict the type of bonding in a substance. 0 Matter can be described and organized by its physical and chemical properties. ). I need ways to figure out how to identify some powders. Identifying an Unknown Compound by Solubility, Functional Group Tests and Spectral Analysis This handout is a supplement to Signature Lab Series ANAL 0727 and contains material adapted from Signature Lab Series ANAL 0727 and 0728, Cengage Learning. 142 = 2612. Mo. Learn how to write a molecular formula for several carbohydrates 2. In general, what we call “water”is a solution that is essential to life. All matter can be classified as either a pure substance or a mixture. HOMEWORK ANSWERS and HANDOUTS. When the probe is placed in a solution that Next, the teacher will assist the students in planning an investigation that will test methods to determine the identity of substances based on their characteristic properties. These properties can be classified as either physical properties or chemical properties. Electrolysis is defined as the decomposition of a substance by means of an electric current. Anthocyanins are found in many flowers, fruits, and World's largest library of math & science simulations. We were naïve to believe that the lessons found would be inquiry-based and purposeful in light of the Ohio Science Standards. Many of these labs allow students to test multiple variables. How can you describe each of the three substances in terms of the chemical property of reactivity? 4. Lawliss Class: Chem 101 Fall 205 < Page break> Aim: The Aim of this Lab Exercise is to show that the composition of a metal cylinder can be established using a laboratory derived specific heat. Chemical changes Properties/Changes Fill in the Blanks Name properties can be observed without chemically changing matter. Imagine an unknown metal of known mass is heated to a known temperature. I. This lab introduces the key ingredients of concrete. edu Identification of an Unknown Metal . These properties are useful in identifying unknown substances. Using Question #1 as a guide: (a) Identify the products that were formed at the  12 Apr 2019 Find answers in the Help Centre . In this lab, you will use acidity and conductivity to identify unknown solutions from a list of possibilities. Qualitative Analysis Lab 2937 Words | 12 Pages. Helpful info: Electrical resistivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current. For example, most metals are hard shiny solids. Add one or two drops of soap to the cup of water and see how this affects the number of paperclips it will hold. Look at your lab Laboratory 4: Determining the Identity of an Unknown Compound Introduction You accidentally forgot to label a bottle of clear liquid, how can you determine its contents? Or perhaps you find a mysterious bottle on the shelf, how can you identify it? We will explore using the chemical properties of compounds to identify an Identifying Substances Using Specific Heat Joe Student Instructor: M. Using ideas from the students, the teacher will create a list of physical and chemical properties that can be used to recognize different substances. Chem1 Classification and properties of matter (Part 1 of 6 lessons on Essential background) covers this topic for a course in General Chemistry. Shown is a series of some of the most common metals, listed in descending order of reactivity. Tables that contain physical properties of various substances are assuming it is pure. The Virtual Lab is an online simulation of a chemistry lab. A chemical change is the change of one or more substances into other substances; the atoms rearrange and form one or more new substances. What is a chemical element? In this lab, you will be given a series of plastic vials containing several common chemical The physical properties and chemical composition of some mineral grains retain hints of their origins despite many generations of rock recycling. Grade 9 Lab Notebook Science in Action 9 Index of Investigations, Challenges and Activities Matter and Chemical Change Investigations Activity Title Page Ref. Caution: the journal and data entry sections of the simulations do not work, so you probably will want to arrange for students to write these on their own pages. Introduction: Specific Heat is a property that varies from substance to substance. The lab allows students to select from hundreds of standard reagents (aqueous) and manipulate them in a manner resembling a real lab. You will do this by using a simple anodizing apparatus. These properties are phase at room temperature, melting point, solubility in water, and electrical conductivity. Detail A solvent is the part of a solution that is present in the largest amount and that dissolves other substances. What is the color, form, and odor of salt? 3. I have to write a lab report about identifying substances using properties, and I don't have a clue how to write a lab report! How do you write a lab report In this high school chemistry lab activity, students will be given a several samples of compounds which they will test. This experiment involves identifying the cations and anions in various salt solutions. Clicking on the Go button will open a new browser window and take you to a website outside of SciLinks. Because school science curricula have changed since then, the safety guide has been On the other hand, chemical properties represent the changes in the composition of a substance when it reacts with other substances or decomposing into new other pure substances. com Lab 4 - Qualitative Analysis Purpose To develop a separation scheme and confirmatory tests for Fe 3+, Ba 2+, and Ag + cations, and to use it to identify the ions in a sample of unknown composition. STUDY. 180. Advice from a Chemistry Tutor: Identifying the Unknown Solutions Lab. Anticipatory Set • Begin with a warm up asking students to use their solubility rules to predict whether each of the following substances is soluble or insoluble in water: AgOH, Na2SO4, ca(NO3)2 Mass of empty 100 ml beaker Mass of leftover copper wire Appearance of leftover copper wire Mass of Copper Used Mass of beaker plus silver product Lab #21: Chromatography Lab . Specifically, you must identify a two-step process by which to separate aluminum Using Periodic Properties to Identify Group 2A and Group 7A Ions Page 3 of 4 In summary, no color change means that no reaction occurred and a color change means that a reaction occurred. So identifying it as water from its boiling point physical property will not be possible. Record the trends that you notice on your lab worksheet. Ionic bonds result when one or more Objectives: Upon completing this lab, you will 1. You will use these properties to classify substances as ionic or covalent. Background Information: Pre-lab Preparation 1. Differentiate among the physical states of matter. Christian Smith Dr. original properties. The experiment itself was also important in applying student’s Read and complete a lab safety form. • Properties and change of properties can be quantified. Physical operations do not change the chemical nature of the substances involved. In this experiment, we will use three properties to identify a liquid substance: solubility, density problems are minimized by using small amounts of the liquids. The procedure you will use is to determine several of its physical properties and chemical reactions and compare these to samples of known substances. Chemical properties tell us how the substance interacts with other substances and may include reaction with oxygen (oxidation), chlorine, metals, etc. 1 How Can You Identify Organic Macromolecules? Refer to the figure (Some Simple Chemistry) on the next page when doing this activity. Concepts Chemical bonds Covalent bonding Ionic bonding Introduction Metallic bonding Physical and chemical properties Electronegativity Groups of atoms are held together by attractive Lab-Properties of Solids/ Bond Types Safety goggles must be worn at all times Introduction: Groups of atoms are held together by attractive forces we call chemical bonds. The availability of property and spectral information in comprehensive substance collections can enhance research efficiency, saving chemists time and money. identifying substances using properties lab answers

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