6.1- Chemical vs. Physical - Pre-Lab Questions

Size: px
Start display at page:

Download "6.1- Chemical vs. Physical - Pre-Lab Questions"

Transcription

1 6.1- Chemical vs. Physical - Pre-Lab Questions Name: Instructor: Date: Section/Group: 1. Using the procedures for each station provided as a guide, predict which properties you will be looking for in each experiment to determine if the process is a physical or chemical change. Station Process (Physical or Chemical) Explanation Station 1: Sodium Polyacrylate and Water Station 2: Burning Magnesium Station 3: Milk of Magnesia Station 4: Invisible Ink Station 5: Disappearing Solution Station 6: Iron and Copper Station 7: Cornstarch and Iodine Station 8: Water and Sodium Bic arbonate

2 2. For each of the following processes, indicate whether the change is physical or chemical and explain your answer. a. Chocolate melts in your mouth but not in your hand. b. It rains. c. A banana ripens. 3. Choose one of the processes from Question 1 that you would like to test quantitatively as well as qualitatively. Propose the tests you would run and explain how the quantitative test would assist you in your assessment of the process as a physical or chemical change. Downloads

3 6.2 - Chemical vs. Physical - Introduction Chemistry is the study of matter and the changes it undergoes. These changes can be divided into two types: physical and chemical. In a physical change, one or more physical properties of a substance are altered. Physical properties include, but are not limited to, the size, shape, color, and state of matter. No new compounds are formed as a result of a physical change. A chemical change results in the formation of one or more new substances. These new products of a reaction differ in chemical properties and composition from the original substance. The ability to differentiate between these two types of change is the focus of this lab. Relevance We experience physical and chemical changes in our daily lives. For example, consider a loaf of bread. When you purchase a loaf of white bread, it has a particular shape, feel, color, and smell. After a few days at home, you might find that the bread has changed shape and appears distorted, crusty, or moldy. You are concerned it may have gone bad, but you don't want to throw it away, if it can still be used. So you ask yourself if the changes it has undergone only physical? How can you tell if it is safe to eat? As a chemist, you can run a series of qualitative tests: you squeeze it, you look it over, and you smell it. If it passes all those preliminary exams, then you taste it. If it still tastes good, you eat it; if not, you make a run to the store for more bread. Congratulations, you have just completed a qualitative analysis of bread! As you can see, a chemist's work is never done, and knowledge of the differences between physical and chemical changes has relevance both inside and outside the laboratory. Physical Changes Physical changes are changes that focus on the shape of a compound or the internal energy of a compound and its state. The change in a compound s shape is easy to understand. Examples of this type of change include crushing an aluminum can or slicing a stick of butter. A physical change, which does not create a new substance but changes the energy level of the molecules within the substance requires more explanation. Molecules of a substance that have a higher energy content tend to be gases or liquids. Those with a lower energy content are normally solids. In creating higher or lower energy states, a chemist can use either temperature or pressure to create these changes. Changes in energy level that result in changes of state or phase melting, freezing, vaporization, condensation, sublimation are physical changes. Some examples of physical changes that are the result of a change in energy include melting an ice cube, sublimating dry ice, and boiling water. Chemical Changes A chemical change takes place when a new compound forms or a compound decomposes. These changes take place at the molecular level and involve the exchange of elements. Examples of chemical changes include combustion (burning), cooking an egg, rusting of an iron nail, and mixing acids and bases to make salt and water. When a chemical change occurs, you may see the production of light or heat, smell an odor, or hear a sound. Unfortunately, like physical changes, a chemical change may also be identified by a change in shape or gas

4 production. This overlap in indicators often causes students problems in discerning the difference in the type of change that is taking place. This is why it is important to have a good qualitative analysis scheme in place as you approach the problem. Qualitative Analysis Qualitative analysis is used to observe and describe chemical properties and processes. When making observations a complete, detailed description is recorded that does not necessarily require a mathematical calculation or measurement. The advantage of qualitative analysis is that it collects ambiguous data that would be impossible to quantify. For example, terms that might be used for describing a precipitate forming in a reaction could be fluffy or gritty. While these terms are highly descriptive, they are very difficult to measure. Typically, qualitative analysis will not be done alone, but will be paired with quantitative analysis. Quantitative Analysis Quantitative analysis involves taking measurements. When quantifying a reaction or change taking place in the laboratory, a detailed calculation or measurement is recorded. The advantage of quantitative analysis is that it collects precise data that scientists can test and reproduce. For example, if a precipitate forms in a reaction we can calculate the theoretical amount of precipitate that is expected to form and compare that with the actual amount formed. To illustrate how a qualitative description differs from a quantitative one, consider the following statements: Qualitative: Magnesium burns in air with a brilliant white flame to form magnesium oxide. Quantitative: Ten grams (10g) of magnesium burns in air to form approximately g of magnesium oxide. Qualitative observations in the laboratory are a very good precursor for quantitatively examining a process or reaction. We use qualitative analysis to establish assumptions and test them through quantitative analysis.

5 6.3 - Chemical vs. Physical - Procedure The Experiment In today s lab, you will be presented with 8 stations that each contain an unknown process. You must identify each station as a physical or chemical change. Prior to coming to lab, you should create a list of criteria that you can use to distinguish these changes. A careful review of the eight procedures will assist you in creating these criteria. A small amount of preparation before lab will save you a lot of time in lab. Note: Each station has a waste container to collect the waste generated by each test. Be sure to leave the glassware and equipment at each station in the condition you found it. Be sure to clean and dry everything for the next student to use. Wash your hands thoroughly before leaving the lab as usual. Station 1: Sodium Polyacrylate and Water 1. Obtain a 100 ml beaker. 2. Measure a small scoop of sodium polyacrylate and place it into the beaker. 3. Add ~10 ml of water and observe the changes that take place. 4. Invert the beaker over the sink and record your observations. 5. Clean up: Dispose of the mixture in a plastic-lined wastebasket. Clean the beaker with soap and tap water. Station 2: Burning Magnesium Note: This station may be demonstrated by the instructor. 1. Obtain a small piece (1-2 cm) of magnesium ribbon. 2. With tongs, hold the ribbon in the hottest part of the flame (tip of inner blue cone) to ignite it. 3. Hold the ribbon in the hottest part of the Bunsen burner flame to ignite it. (Do not look directly at the burning magnesium!) 4. Record your observations. 5. Clean up: Once cooled to room temperature, the magnesium oxide solid from the ribbon should be discarded in a waste container. Station 3: Milk of Magnesia (Magnesium hydroxide formation from magnesium sulfate.) 1. Add 50 ml of water to a 100 ml beaker. 2. Add ~1 tsp of epsom salt to the water in the beaker. Stir to dissolve. 3. Add about 1-2 ml of commercial ammonia to the beaker. 4. Record your observations. 5. Clean up: Dispose of the resulting solution in the waste container provided. Station 4: Invisible Ink 1. Collect a toothpick and a small piece of paper. 2. Dip the toothpick into lemon juice and write your name on the piece of paper. 3. Allow the lemon juice to dry. 4. Pass the piece of paper over the warmed hot plate using tongs.

6 5. Record your observations. 6. Clean up: You can keep the paper or throw it away. Station 5: Disappearing Solution 1. Using a 10 ml graduated cylinder, measure out approximately 5 ml of rubbing alcohol (70% isopropyl alcohol). 2. Add distilled water (~ 5 ml) to fill the cylinder to the 10 ml calibration mark. 3. Record your observations of the resulting solution and its volume. 4. Clean up: Dispose of the solution in the waste container provided. Station 6: Iron and Copper 1. Obtain a clean, dry test tube. 2. Add a small scoop of iron filings to the test tube. 3. Using the dropper bottle provided, add ~20 drops of 1.0 M copper sulfate to the test tube. 4. Record your observations. 5. Clean up: Dispose of the waste in the container provided. Station 7: Cornstarch and Iodine 1. Obtain a small watch glass. 2. Place a scoop of cornstarch onto the watch glass and add a drop of iodine solution. 3. Record your observations. 4. Clean up: Rinse the waste into the container provided. Station 8: Water (H 2 O) and Sodium Bicarbonate (NaHCO 3 ) 1. Obtain a large test tube. 2. Fill the test tube with water until it is ¾ full. 3. Add several scoops of NaHCO Record your observations. 5. Clean up: Dispose of the solution down the sink with plenty of water.

7 6.4 - Chemical vs. Physical - Report Form Name: Instructor: Date: Section/Group: Data Record your observations for each process. Station 1: Sodium Polyacrylate and Water Station 2: Burning Magnesium Station 3: Milk of Magnesia Station 4: Invisible Ink Station 5: Disappearing Solution Station 6: Iron and Copper Station 7: Cornstarch and Iodine Station 8: Water and Sodium Bicarbonate Summary of Observations

8 Station Number Type of Change Explanation

9 6.5 - Chemical vs. Physical - Post-Lab Questions Name: Instructor: Date: Section/Group: Show all work for full credit. 1. Physical and chemical properties are not exactly the same as physical and chemical changes. Explain the differences. 2. When an acid is added to sodium bicarbonate, CO 2 gas is formed. When dry ice sublimes, gaseous CO 2 is formed. One process is chemical and the other is physical. Explain.

LAB TEST Physical and Chemical Changes

LAB TEST Physical and Chemical Changes NAME: DATE: STATION: LAB TEST Physical and Chemical Changes PURPOSE: To observe physical and chemical changes in matter MATERIALS: 3 medium test tubes 1 small test tube test tube rack test tube holder

More information

HYSICAL AND CHEMICAL PROPERTIES AND PHYSIC AND CHEMICAL CHANGES

HYSICAL AND CHEMICAL PROPERTIES AND PHYSIC AND CHEMICAL CHANGES Experiment 4 Name: 15 P HYSICAL AND CHEMICAL PROPERTIES AND PHYSIC AND CHEMICAL CHANGES 13 Al e In this experiment, you will also observe physical and chemical properties and physical and chemical changes.

More information

What are the three different types of elements and what are their properties?

What are the three different types of elements and what are their properties? Name: Partners name(s): Stamp: Laboratory 5: Types of Matter and its changes Compounds, mixtures, elements, chemical /physical properties Classify several different compounds, elements and mixtures by

More information

INTRODUCTION TO MATTER: CLASSI F ICATION OF MATTER, PHYSICAL AND C He MICAL PROPERTIES, AND PHYSICAL AND CHEMICAL CHANGES

INTRODUCTION TO MATTER: CLASSI F ICATION OF MATTER, PHYSICAL AND C He MICAL PROPERTIES, AND PHYSICAL AND CHEMICAL CHANGES Experiment 3 Name: INTRODUCTION TO MATTER: 9 4 CLASSI F ICATION OF MATTER, PHYSICAL AND C He MICAL e PROPERTIES, AND PHYSICAL AND CHEMICAL CHANGES In this experiment, you will encounter various classification

More information

Substances and Mixtures:Separating a Mixture into Its Components

Substances and Mixtures:Separating a Mixture into Its Components MiraCosta College Introductory Chemistry Laboratory Substances and Mixtures:Separating a Mixture into Its Components EXPERIMENTAL TASK To separate a mixture of calcium carbonate, iron and sodium chloride

More information

5. Researching the properties of particular materials and understand why they are used for particular products.

5. Researching the properties of particular materials and understand why they are used for particular products. 1. The difference between a physical and chemical change. 2. How to identify whether a physical or chemical change has taken place. 3. Understand what reactants and products are. 4. Writing and understanding

More information

Experiment 8 - Chemical Changes

Experiment 8 - Chemical Changes Experiment 8 - Chemical Changes When a chemical change occurs, the chemicals that you start with are changed into different chemicals. We know when this happens because the new chemicals have different

More information

or a chemical change in several experimental trials.

or a chemical change in several experimental trials. Regular Chemistry Lab Chemical and Physical Changes. Intro: As we study matter, we base most of our classification and identification of pure substances on chemical and physical properties. A physical

More information

CHM 130LL: Chemical and Physical Changes

CHM 130LL: Chemical and Physical Changes CHM 130LL: Chemical and Physical Changes In this experiment you will observe and record observations of properties of substances and you will cause changes to occur and classify these changes as physical

More information

Santa Monica College Chemistry 11

Santa Monica College Chemistry 11 Types of Reactions Objectives The objectives of this laboratory are as follows: To perform several types of simple chemical reactions, To become familiar with some common observable signs of chemical reactions,

More information

CHM 130 Physical and Chemical Changes

CHM 130 Physical and Chemical Changes Objectives CHM 130 and Changes 1. List physical and chemical properties of substances and explain how they are used in identification and separation of substances. 2. Become familiar with the concepts

More information

Classifying Chemical Reactions: Lab Directions

Classifying Chemical Reactions: Lab Directions Classifying Chemical Reactions: Lab Directions Please Return Background: The power of chemical reactions to transform our lives is visible all around us in our homes, in our cars, even in our bodies. Chemists

More information

Experiment #7. Chemical Reactions.

Experiment #7. Chemical Reactions. Experiment #7. Chemical Reactions. Goals To observe chemical reactions and balance chemical equations. Background Chemical and Physical Changes Changes in matter are often classified as either physical

More information

Physical and Chemical Properties and Changes Lab

Physical and Chemical Properties and Changes Lab Name: Date: Period: Group Members Physical and Chemical Properties and Changes Lab Station 1 Color Station Instruction: Describe the color of the following substances. Substance Color 1. Sulfur 2. Ammonium

More information

CHM101 Lab Chemical Reactions Grading Rubric

CHM101 Lab Chemical Reactions Grading Rubric Name Team Name CHM101 Lab Chemical Reactions Grading Rubric To participate in this lab you must have splash- proof goggles, proper shoes and attire. Criteria Points possible Points earned Lab Performance

More information

Pre-Lab Read the entire laboratory assignment. Answer all pre-lab questions before beginning the lab.

Pre-Lab Read the entire laboratory assignment. Answer all pre-lab questions before beginning the lab. Name: Date: Pd: Lab Partner: Lab # 13: Types of Reactions, Predicting Products of Chemical Reactions Lab Accelerated Chemistry 1 Introduction: If you examine your bicycle after it has been left out in

More information

Liquid X Lab. Number of Drops Before Spilling Trial 1 Trial 2 Trial 3. Write a conclusion: How do your results for Liquid X compare to water?

Liquid X Lab. Number of Drops Before Spilling Trial 1 Trial 2 Trial 3. Write a conclusion: How do your results for Liquid X compare to water? Names Block Date BIG QUESTION: Liquid X Lab Station 1 Surface Tension, Cohesion, and Adhesion Water is cohesive, adhesive, and has surface tension. Does Liquid X have the same properties? 1. Use a pipette

More information

MATTER. Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space.

MATTER. Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space. MATTER Chemistry is the study of matter and the changes that matter undergoes. Matter is anything that has mass and takes up space. Properties of Matter Physical Properties Can be observed without changing

More information

Liquid X Lab. Station 1 The Penny Lab Water is cohesive, adhesive, and has surface tension. Does Liquid X have the same properties?

Liquid X Lab. Station 1 The Penny Lab Water is cohesive, adhesive, and has surface tension. Does Liquid X have the same properties? Names Block Date Liquid X Lab Station 1 The Penny Lab Water is cohesive, adhesive, and has surface tension. Does Liquid X have the same properties? 1. Use a pipette to carefully place drops of each liquid

More information

Types of Chemical Reactions

Types of Chemical Reactions Types of Chemical Reactions Objectives Perform and observe the results of a variety of chemical reactions. Become familiar with the observable signs of chemical reactions. Identify the products formed

More information

Part II. Cu(OH)2(s) CuO(s)

Part II. Cu(OH)2(s) CuO(s) The Copper Cycle Introduction In this experiment, you will carry out a series of reactions starting with copper metal. This will give you practice handling chemical reagents and making observations. It

More information

Characteristics of Chemical Change

Characteristics of Chemical Change Section 2 Characteristics of Chemical Change What Do You See? Learning Outcomes In this section you will Observe several typical examples of evidence that a chemical change is occurring. Make generalizations

More information

Minneapolis Community and Technical College. Separation of Components of a Mixture

Minneapolis Community and Technical College. Separation of Components of a Mixture Minneapolis Community and Technical College Chemistry Department Chem1020 Separation of Components of a Mixture Objectives: To separate a mixture into its component pure substances. To calculate the composition

More information

Measuring Enthalpy Changes

Measuring Enthalpy Changes Measuring Enthalpy Changes PURPOSE To observe changes in enthalpy in chemical processes. GOALS To identify exothermic and endothermic processes. To relate enthalpy changes and entropy changes to changes

More information

What Do You Think? Investigate GOALS

What Do You Think? Investigate GOALS Activity 2 More Chemical Changes GOALS In this activity you will: Observe several typical examples of evidence that a chemical change is occurring. Make generalizations about the combinations of materials

More information

Post-Show. Chemistry. Periodic Table of the Elements. After the Show. Traveling Science Shows

Post-Show. Chemistry. Periodic Table of the Elements. After the Show. Traveling Science Shows Traveling Science Shows Post-Show Chemistry After the Show We recently presented a Chemistry show at your school, and thought you and your students might like to continue investigating this topic. The

More information

Identification of an Unknown Compound through Mass Correlations

Identification of an Unknown Compound through Mass Correlations EXPERIMENT Identification of an Unknown Compound through Mass Correlations PURPOSE To carry out a series of decomposition reactions for five different unknown, and use stoichiometry in order to identify

More information

Chapter #6 Properties of Matter

Chapter #6 Properties of Matter Chapter #6 Properties of Matter Matter anything that occupies space and has mass. Pure Substance is matter with fixed composition, can be an element or a compound. Element a type of atom. About 90 are

More information

Solutions: Chemical or Physical Change?

Solutions: Chemical or Physical Change? Section 1 Solutions: Chemical or Physical Change? What Do You See? Learning Outcomes In this section you will Learn to differentiate between chemical and physical changes. Make observations and cite evidence

More information

What Do You Think? Investigate GOALS

What Do You Think? Investigate GOALS Activity 1 Chemical and Physical Changes GOALS In this activity you will: Learn to differentiate between chemical and physical changes. Make observations and cite evidence to identify changes as chemical

More information

What is Science? Science is both a collection of knowledge and the process for building that knowledge.

What is Science? Science is both a collection of knowledge and the process for building that knowledge. Introduction to Science Junior Science What is Science? Science is both a collection of knowledge and the process for building that knowledge. Science asks questions about the natural world and looks for

More information

STATES OF MATTER INTRODUCTION

STATES OF MATTER INTRODUCTION STATES OF MATTER INTRODUCTION In studying chemical reactions, we talk in terms of interactions between molecules, atoms, and electrons. However, in order to understand chemical changes, we must first have

More information

Physical and Chemical Properties of Matter Lab

Physical and Chemical Properties of Matter Lab Physical and Chemical Properties of Matter Lab Purpose To introduce the student to physical and chemical properties of matter and their use for the identification and separation of compounds. Each student

More information

CHM 151LL: States of Matter: Physical and Chemical Changes Objective

CHM 151LL: States of Matter: Physical and Chemical Changes Objective CHM 151LL: States of Matter: Physical and Chemical Changes Objective Introduction Name: Partner(s): Section: In this lab you will investigate the three states of matter, explore the nature of physical

More information

Standards 8.5.c. I know chemical reactions usually liberate or absorbs heat.

Standards 8.5.c. I know chemical reactions usually liberate or absorbs heat. 6 March 2013 Give an example of a physical change and a chemical change, and then describe how they are different from the other. Explain your answer in 2-3 sentences. Standards 8.5.c. I know chemical

More information

Physical and Chemical Changes Or How Do You Know When You ve Made Something New?

Physical and Chemical Changes Or How Do You Know When You ve Made Something New? Introduction Or How Do You Know When You ve Made Something New? Remember that all matter has characteristic physical and chemical properties. Matter can also undergo physical and chemical changes. How

More information

3. The hypothesis can then be tested by experiments designed to collect more data about the problem.

3. The hypothesis can then be tested by experiments designed to collect more data about the problem. University of Puget Sound Department of Chemistry Experiment 1 Chem 110 OBSERVATIONS-DESCRIBING WHAT CAN BE SEEN LABORATORY OBJECTIVES AND ASSESSMENTS 1. Be conversant in the use of laboratory notebooks

More information

Physical & Chemical PROPERTIES

Physical & Chemical PROPERTIES Name Test Date Hour Group Chem #4 Notebook Properties & Changes LEARNING TARGETS I can give examples of physical and chemical properties. I can give examples of physical and chemical changes. I can identify

More information

1 st Semester Exam Study Guide 1.) Which of the following is NOT a compound? Explain why. a. H2O b. O2

1 st Semester Exam Study Guide 1.) Which of the following is NOT a compound? Explain why. a. H2O b. O2 1 st Semester Exam Study Guide 1.) Which of the following is NOT a compound? Explain why. a. H2O b. O2 2.) A chemist has discovered what she thinks is a new molecule. In order for it to be a molecule,

More information

General Chemistry I CHEM-1030 Laboratory Experiment No. 2 Physical Separation Techniques

General Chemistry I CHEM-1030 Laboratory Experiment No. 2 Physical Separation Techniques General Chemistry I CHEM-1030 Laboratory Experiment No. 2 Physical Separation Techniques Introduction When two or more substances that do not react chemically are blended together, the components of the

More information

Lyniece McKim Biology Instructor Star Valley High Afton, WY.

Lyniece McKim Biology Instructor Star Valley High Afton, WY. Lyniece McKim Biology Instructor Star Valley High Afton, WY lmckm@lcsd2.org TEACHER SHARE-A-THON NABT 2010 Biology: Chemistry of Life Lab: Testing Mystery Substances Inquiry activity Using indicators;

More information

Name: 1. Which of the following is probably true about 300 ml of sand and 300 ml of water?

Name: 1. Which of the following is probably true about 300 ml of sand and 300 ml of water? Name: Jaguar Review #2 Physical Sciences Benchmark A: Relate uses, properties and chemical processes to the behavior and/or arrangement of the small particles that compose matter. 1. Which of the following

More information

Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question.

Name: Class: Date: Multiple Choice Identify the choice that best completes the statement or answers the question. Name: Class: Date: Chapter 1 and 2 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. One difference between a mixture and a compound is that.

More information

Chemical Reactions: Introduction to Reaction Types

Chemical Reactions: Introduction to Reaction Types Chemical Reactions: Introduction to Reaction Types **Lab Notebook** Record observations for all of the chemical reactions carried out during the lab in your lab book. These observations should include:

More information

Experiment 17. Synthesis of Aspirin. Introduction

Experiment 17. Synthesis of Aspirin. Introduction Experiment 17 Introduction Synthesis of Aspirin Aspirin (acetylsalicylic acid) is a synthetic organic derived from salicylic acid. Salicylic acid is a natural product found in the bark of the willow tree

More information

Laboratory 3. Development of an Equation. Objectives. Introduction

Laboratory 3. Development of an Equation. Objectives. Introduction Laboratory 3 Development of an Equation Objectives Apply laboratory procedures and make observations to investigate a chemical reaction. Based on these observations, identify the pattern of reactivity

More information

EXPERIMENT 6 Empirical Formula of a Compound

EXPERIMENT 6 Empirical Formula of a Compound EXPERIMENT 6 Empirical Formula of a Compound INTRODUCTION Chemical formulas indicate the composition of compounds. A formula that gives only the simplest ratio of the relative number of atoms in a compound

More information

Experiment #5. Empirical Formula

Experiment #5. Empirical Formula Experiment #5. Empirical Formula Goal To experimentally determine the empirical formula of magnesium oxide based on reaction stoichiometry. Introduction The molecular formula (usually shortened to simply

More information

Classifying Chemical Reactions

Classifying Chemical Reactions Classifying Chemical Reactions Prepared by M.L. Holland and A.L. Norick, Foothill College Purpose of the Experiment To make observations when reactants are combined and become familiar with indications

More information

EXPERIMENT 4 THE N-BOTTLE PROBLEM

EXPERIMENT 4 THE N-BOTTLE PROBLEM EXPERIMENT 4 THE N-BOTTLE PROBLEM INTRODUCTION The purpose of this experiment is to use your knowledge about acid-base and precipitation reactions that occur in aqueous solutions to identify the ionic

More information

AP Chemistry Lab #5- Synthesis and Analysis of Alum (Big Idea 1 & 2)

AP Chemistry Lab #5- Synthesis and Analysis of Alum (Big Idea 1 & 2) www.pedersenscience.com AP Chemistry Lab #5- Synthesis and Analysis of Alum (Big Idea 1 & 2) 1.A.1: Molecules are composed of specific combinations of atoms; different molecules are composed of combinations

More information

SPECIFIC HEAT OF WATER LAB 11-2

SPECIFIC HEAT OF WATER LAB 11-2 CONCEPT Heat of Fusion Changes of state (phase changes) involve the conversion or transition of matter from one of the common states (solid, liquid or gas) to another. Examples include fusion or melting

More information

Western Carolina University. Chem 132 Lab 04 Introduction to Physical Changes and Chemical Reactions Introduction

Western Carolina University. Chem 132 Lab 04 Introduction to Physical Changes and Chemical Reactions Introduction Chem 132 Lab 04 Introduction to Physical Changes and Chemical Reactions Introduction This lab serves as an introduction to physical changes. Physical changes involve a change in the form of matter without

More information

Laboratory 23: Properties of Aldehydes and Ketones

Laboratory 23: Properties of Aldehydes and Ketones Introduction Laboratory 23: Properties of Aldehydes and Ketones Aldehydes and Ketones represent an important class of organic molecules containing a carbonyl carbon. In this experiment you will study the

More information

Section I: Synthesis reactions Synthesis reactions occur when two or more substances come together to form a single new substance.

Section I: Synthesis reactions Synthesis reactions occur when two or more substances come together to form a single new substance. TYPES OF CHEMICAL REACTIONS A Laboratory Investigation Purpose: Observe the five major types of reactions. Record observations for these reactions. Complete balanced equations for these reactions. Introduction:

More information

Which particle diagram represents molecules of only one compound in the gaseous phase?

Which particle diagram represents molecules of only one compound in the gaseous phase? Name: 1) Which species represents a chemical compound? 9114-1 - Page 1 NaHCO3 NH4 + Na N2 2) 3) 4) Which substance represents a compound? Co(s) O2(g) CO(g) C(s) Which terms are used to identify pure substances?

More information

Physical and Chemical Changes

Physical and Chemical Changes Exercise 3 Page 1 Illinois Central College CHEMISTRY 130 Laboratory Section Name Physical and Chemical Changes Objectives The purpose of this experiment is to observe carefully several changes in matter

More information

INTRODUCTION TO ACIDS, BASES AND TITRATION

INTRODUCTION TO ACIDS, BASES AND TITRATION Experiment INTRODUCTION TO ACIDS, BASES AND TITRATION The CCLI Initiative Computers in chemistry Laboratory Instruction LEARNING OBJECTIVES The objectives of this experiment are to... introduce the nature

More information

St. John s College High School Mr. Trubic AP Midterm Review Packet 1

St. John s College High School Mr. Trubic AP Midterm Review Packet 1 Name Date Directions: Read each question carefully and write your response in the space provided following each question. Your responses to these questions will be scored on the basis of the accuracy and

More information

1 What is a chemical reaction?

1 What is a chemical reaction? 1 What is a chemical reaction? Substances on Earth are being continually changed due for example to extremes of hot and cold, to wind and weather, to acid rain and to solutions of different chemicals coming

More information

CHEM 30A EXPERIMENT 4: HYDRATE. Learning Outcomes. Introduction. Upon completion of this lab, the student will be able to:

CHEM 30A EXPERIMENT 4: HYDRATE. Learning Outcomes. Introduction. Upon completion of this lab, the student will be able to: 1 Learning Outcomes CHEM 30A EXPERIMENT 4: HYDRATE Upon completion of this lab, the student will be able to: 1) Describe the differences between an anhydrous and hydrate compound. 2) Calculate the number

More information

Chapter 2: Properties of Matter Student Outline 2.1 Classifying Matter A. Pure Substances

Chapter 2: Properties of Matter Student Outline 2.1 Classifying Matter A. Pure Substances Name: Date: Physical Science Period: Chapter 2: Properties of Matter Student Outline GA Performance Standards SPS1. Students will investigate our current understanding of the atom. SPS2. Students will

More information

(2 Lab Periods) Chemistry 105 Lab LABORATORY 5: MATTER AND ITS CHANGES

(2 Lab Periods) Chemistry 105 Lab LABORATORY 5: MATTER AND ITS CHANGES (2 Lab Periods) Chemistry 105 Lab LABORATORY 5: MATTER AND ITS CHANGES I. THE PERIODIC TABLE A. ELEMENTS Memorize selected elements. Correct spelling is essential!!! B. Periods are horizontal rows on the

More information

EXPERIMENT 7: THE LIMITING REACTANT

EXPERIMENT 7: THE LIMITING REACTANT EXPERIMENT 7: THE LIMITING REACTANT PURPOSE To find the ratio of moles of a reactant to moles of a product of a chemical reaction. To relate this ratio to the coefficients of these substances in the balanced

More information

Today is: Monday, October 17th

Today is: Monday, October 17th Today is: Monday, October 17th Get out your homework! 10/17/2016 #motivationmonday (This is Week 11 Warm Ups!) 1. It s a new quarter, which means a fresh start! What can you do to stay motivated this quarter?

More information

Chem 2115 Experiment #10. Acids, Bases, Salts, and Buffers

Chem 2115 Experiment #10. Acids, Bases, Salts, and Buffers Chem 2115 Experiment #10 Acids, Bases, Salts, and Buffers OBJECTIVE: The goal of this series of experiments is to investigate the characteristics of acidic and basic solutions. We will explore the neutralization

More information

Pre-Lab Exercises Lab 3: Chemical Properties

Pre-Lab Exercises Lab 3: Chemical Properties Pre-Lab Exercises Lab 3: Chemical Properties 1. How is a chemical property different from a physical property? Name Date Section 2. How is a chemical change different from a physical change? 3. Give two

More information

2/22/2019 NEW UNIT! Chemical Interactions. Atomic Basics #19

2/22/2019 NEW UNIT! Chemical Interactions. Atomic Basics #19 NEW UNIT! Chemical Interactions Atomic Basics #19 1 Vocabulary: Matter: Anything that has mass and takes up space. Atom: the smallest particle of matter. Element: A pure substance made up of only one type

More information

Final Review Graphs and Charts TWO Page 1 of 35

Final Review Graphs and Charts TWO Page 1 of 35 TEST NAME:Final Review Graphs and Charts TWO TEST ID:1086907 GRADE:11 Eleventh Grade 12 Twelfth Grade SUBJECT:Life and Physical Sciences TEST CATEGORY:School Assessment Final Review Graphs and Charts TWO

More information

Experiment 2 - Using Physical Properties to Identify an Unknown Liquid

Experiment 2 - Using Physical Properties to Identify an Unknown Liquid Experiment 2 - Using Physical Properties to Identify an Unknown Liquid We usually think of chemists as scientists who do things with chemicals. We can picture a chemist's laboratory with rows of bottles

More information

Separation and Qualitative Determination of Cations

Separation and Qualitative Determination of Cations Separation and Qualitative Determination of Cations Introduction Much of laboratory chemistry is focused on the question of how much of a given substance is contained in a sample. Sometimes, however, the

More information

3. When the external pressure is kpa torr, water will boil at what temperature? a C b C c. 100 C d. 18 C

3. When the external pressure is kpa torr, water will boil at what temperature? a C b C c. 100 C d. 18 C Chemistry EOC Review 5: Physical Behavior of Matter 1. Which gas is monatomic at STP? a. chlorine b. fluorine c. neon d. nitrogen 2. What Kelvin temperature is equal to 25 C? a. 248 K b. 298 K c. 100 K

More information

Lab #5 - Limiting Reagent

Lab #5 - Limiting Reagent Objective Chesapeake Campus Chemistry 111 Laboratory Lab #5 - Limiting Reagent Use stoichiometry to determine the limiting reactant. Calculate the theoretical yield. Calculate the percent yield of a reaction.

More information

Name: Section: Matter: Atoms and Properties Practice Test

Name: Section: Matter: Atoms and Properties Practice Test Name: Section: Matter: Atoms and Properties Practice Test Directions: For each of the questions or incomplete statements below, choose the best of the answer choices given and write your answer on the

More information

Classifying Chemical Reactions

Classifying Chemical Reactions 1 Classifying Chemical Reactions Analyzing and Predicting Products Introduction The power of chemical reactions to transform our lives is visible all around us-in our cars, even in our bodies. Chemists

More information

EXPERIMENT 7 Reaction Stoichiometry and Percent Yield

EXPERIMENT 7 Reaction Stoichiometry and Percent Yield EXPERIMENT 7 Reaction Stoichiometry and Percent Yield INTRODUCTION Stoichiometry calculations are about calculating the amounts of substances that react and form in a chemical reaction. The word stoichiometry

More information

The ability of a substance to be rolled. into wire The physical form of matter (solid, liquid, or gas)

The ability of a substance to be rolled. into wire The physical form of matter (solid, liquid, or gas) CHAPTER 2 2 Physical Properties SECTION The Properties of Matter BEFORE YOU READ After you read this section, you should be able to answer these questions: What are physical properties of matter? What

More information

EXPERIMENT 6. Physical and Chemical Changes Part 2 INTRODUCTION

EXPERIMENT 6. Physical and Chemical Changes Part 2 INTRODUCTION EXPERIMENT 6 Physical and Chemical Changes Part 2 INTRODUCTION Evidence of chemical change can be the evolution of heat or light, the formation of a gas (seen in Experiment 5), the appearance of a material

More information

SYNTHESIS: TECHNIQUES FOR MAKING AND ISOLATING COMPOUNDS rev 10/12

SYNTHESIS: TECHNIQUES FOR MAKING AND ISOLATING COMPOUNDS rev 10/12 EXPERIMENT 5 SYNTESIS: TENIQUES FR MAKING AND ISLATING MPUNDS rev 10/12 GAL In this experiment you will synthesize two compounds and gain experience with simple glassware and laboratory techniques. INTRDUTIN

More information

Working in the Chemistry Laboratory

Working in the Chemistry Laboratory Working in the Chemistry Laboratory Accelerated Chemistry I Introduction: One of the most important components of your chemistry course is the laboratory experience. Perhaps you have done experiments in

More information

Classifying Chemical Reactions Analyzing and Predicting Products

Classifying Chemical Reactions Analyzing and Predicting Products Classifying Chemical Reactions Analyzing and Predicting Products Background A chemical reaction is defined as any process in which one or more substances are converted into new substances with different

More information

By the end of this experiment the student should have learned:

By the end of this experiment the student should have learned: Experiment 3 SUBSTANCES, REACTIONS MIXTURES, AND Learning Objectives By the end of this experiment the student should have learned: 1. To distinguish elements from compounds. 2. To distinguish heterogeneous

More information

Na Na + +e - Cl+e - Cl -

Na Na + +e - Cl+e - Cl - LAB-Ionic vs. Covalent Bonding Have you ever accidentally used salt instead of sugar? Drinking tea that has been sweetened with salt or eating vegetables that have been salted with sugar tastes awful!

More information

Page 1 / 12. Chemistry Exam. Name: Matter Properties, Structure. Question 1 (1 point) The atomic number of an atom is. A. The mass of the atom.

Page 1 / 12. Chemistry Exam. Name: Matter Properties, Structure. Question 1 (1 point) The atomic number of an atom is. A. The mass of the atom. Chemistry Exam Matter Properties, Structure Name: Question 1 (1 point) The atomic number of an atom is A. The mass of the atom. B. The number of protons added to the number of neutrons in the nucleus.

More information

Chemical Reactions of Copper and Percent Recovery

Chemical Reactions of Copper and Percent Recovery and Percent Recovery EXPERIMENT 9 Prepared by Edward L. Brown, Lee University To take copper metal through series of chemical reactions that regenerates elemental copper. Students will classify the various

More information

EXPERIMENT. Stoichiometry of a Precipitation Reaction

EXPERIMENT. Stoichiometry of a Precipitation Reaction EXPERIMENT Stoichiometry of a Precipitation Reaction Hands-On Labs, Inc. Version 42-0201-00-02 Review the safety materials and wear goggles when working with chemicals. Read the entire exercise before

More information

MiSP CHEMICAL REACTIONS, L3 Teacher Guide. Introduction

MiSP CHEMICAL REACTIONS, L3 Teacher Guide. Introduction MiSP CHEMICAL REACTIONS, L3 Teacher Guide Introduction This weeklong unit should be included with other chemistry content teaching and learning. It is designed to follow Intermediate Level Science Core

More information

Matter is all around us everything is made of matter. Matter is anything that takes up space and has mass.

Matter is all around us everything is made of matter. Matter is anything that takes up space and has mass. Matter Study Guide Matter is all around us everything is made of matter. Matter is anything that takes up space and has mass. We can classify objects by their physical properties. Physical properties are

More information

CLASSIFICATION OF MATTER

CLASSIFICATION OF MATTER CLASSIFICATION OF MATTER Qualitative/Quantitative, Extensive/Intensive, States of Matter, Physical/Chemical Properties, Elements, Compounds, Homogeneous and Heterogeneous Mixtures What is Chemistry? Chemistry

More information

Chemistry Lab Define Acids and Bases

Chemistry Lab Define Acids and Bases Introduction Chemistry Lab Define Acids and Bases By the 1500 s chemists recognized that certain substances shared a common property a sour taste. These substances possessed other characteristic properties

More information

To measure ph s in a variety of solutions and mixtures and to account for the results obtained.

To measure ph s in a variety of solutions and mixtures and to account for the results obtained. Acid-Base Studies PURPOSE To measure ph s in a variety of solutions and mixtures and to account for the results obtained. GOALS 1 To learn to use ph paper and a ph meter to measure the ph of a given solution.

More information

Physical and ChemJcaJ Change

Physical and ChemJcaJ Change 2 Textreference: Sections 1,3, 1.9 Physical and ChemJcaJ Change Background Have you ever thought of your eyes as powerful tools for studying chemistry? Many of the properties of matter and the changes

More information

Read the lab thoroughly. Answer the pre-lab questions that appear at the end of this lab exercise.

Read the lab thoroughly. Answer the pre-lab questions that appear at the end of this lab exercise. Experiment 10 Stoichiometry- Gravimetric Analysis Pre-lab Assignment Read the lab thoroughly. Answer the pre-lab questions that appear at the end of this lab exercise. Purpose The purpose this experiment

More information

o Test tube In this experiment, you ll be observing the signs of chemical reactions. These include the following:

o Test tube In this experiment, you ll be observing the signs of chemical reactions. These include the following: Experiment: Chemical Reactions & Chemical s Objective In this experiment, students perform a variety of chemical reactions. For each reaction, student identify the signs that a reaction has occurred, write

More information

Physical Changes and Chemical Reactions

Physical Changes and Chemical Reactions Physical Changes and Chemical Reactions Gezahegn Chaka, Ph.D., and Sudha Madhugiri, Ph.D., Collin College Department of Chemistry Objectives Introduction To observe physical and chemical changes. To identify

More information

Topic Students devise an experiment to determine the types of bonds in three compounds.

Topic Students devise an experiment to determine the types of bonds in three compounds. Types of Bonds Topic Students devise an experiment to determine the types of bonds in three compounds. Introduction Molecules are made of atoms that are held together by either ionic or covalent bonds.

More information

Chemical Changes. Introduction

Chemical Changes. Introduction Chemical Changes Introduction Chemical changes occur around us all the time. Perhaps one of the most common chemical changes that we have seen for a number of years is the destruction of marble and limestone

More information

2. Synthesis of Aspirin

2. Synthesis of Aspirin This is a two-part laboratory experiment. In part one, you will synthesize (make) the active ingredient in aspirin through a reaction involving a catalyst. The resulting product will then be purified through

More information

Thermal Energy and Temperature Lab. Experiment Question: How can the difference between thermal energy and temperature be experimentally observed?

Thermal Energy and Temperature Lab. Experiment Question: How can the difference between thermal energy and temperature be experimentally observed? Thermal Energy and Temperature Lab Name 7 th Grade PSI Grade / 20 Experiment Question: How can the difference between thermal energy and temperature be experimentally observed? Hypothesis Starters: 1.

More information

Name: Broughton High School. Physical Science Work Book 2016

Name: Broughton High School. Physical Science Work Book 2016 Name: Broughton High School 1 Chapter 15 Classification of Matter Vocabulary Words Vocabulary Word Definition Chemical Change 2 Chemical Property Colloid Compound Distillation Element Heterogeneous Mixture

More information