EXPERIMENT 13: GAS STOICHIOMETRY

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "EXPERIMENT 13: GAS STOICHIOMETRY"

Transcription

1 EXPERIMENT 13: GAS STOICHIOMETRY PURPOSE To collect a gas produced in a reaction and compare the volume actually collected to a "target volume". To discover and compensate for assumptions made in the stoichiometric calculations to collect the "target volume" of gas. BACKGROUND Magnesium is the least dense structural metal. Because of its lightness it is often alloyed with aluminum and used to make custom-designed racing car wheels called MAG wheels. Both magnesium and aluminum are very reactive with acids such as the hydrochloric acid used in this experiment. This explains why manufacturers of these expensive wheels warn consumers that the use of any acid-cleaning product will affect the surface and void the warranty. In this experiment you will carry out a reaction between magnesium and hydrochloric acid. The balanced equation for the reaction is: Mg (s) + 2 HCl (l) MgCl 2(aq) + H 2(g) The goal is to collect a specified volume of H 2 gas by calculating the mass of Mg needed to produce that volume. You will calculate how much magnesium is needed by using stoichiometry and the Ideal Gas Laws. Keep in mind, however, that the conditions in the laboratory are probably not Standard. You will need to correct for any non-stp condition. Also be aware that other gases, notably water vapor, will contaminate your hydrogen gas and you will need to account for the partial pressure of the water vapor in your product. Information about the partial pressure of water vapor can be found in your textbook.

2 MATERIALS Thermometer Barometer 5 gallon plastic bucket Gas collecting tube Four beam balance Magnesium ribbon Ruler Copper wire 1 hole rubber stopper 6 M HCl PROCEDURE 1. Find the mass of exactly 30 cm of magnesium ribbon (your instructor may provide this information). 2. Calculate the mass of magnesium metal needed to collect exactly 40 ml of H 2 gas from the reaction given in the Background. 3. Calculate the length of magnesium ribbon having the necessary mass. Cut the needed length of magnesium ribbon and fold it into a small ball no larger than a pea. 4. Obtain about 25 cm of copper wire and wrap it around the Mg ribbon. As the acid reacts with the Mg ribbon, the ribbon will become smaller and smaller. Be sure that you wrap the copper wire tightly enough so that the magnesium ribbon will not fall out as it decreases in size. Be sure to leave a "tail" of copper wire free ( about 3-5 cm) when you are finished wrapping. Your instructor will show you what this should look like when you are finished. 5. Pour 10 ml of 6M HCl into the gas collecting tube. Tilt the tube to about 45 and VERY GENTLY pour water into the tube until it overflows. The object here is to have a layer of water on top with no acid mixed in. As you pour the water over the top, watch for the tell-tale signs of mixing. If you are careful, you will "see" the mixing for only a few cm. Note : It is important that steps 6 and 7 be done quickly: 6. Insert the copper wire cage into the water so that the "tail" is outside of the tube. Fit the stopper into the tube so that the copper cage is fixed in place. 7. Fill the stopper hole with water. Put a finger over the hole, invert the tube and insert the tube into the 5 gallon bucket filled with water. Remove your finger from the rubber stopper. 8. When the reaction has stopped, raise your tube out of the water until the height of the water inside the tube is the same as the height of the water in the bucket. Record the volume of gas inside the tube. Remember to read the volume at the bottom of the meniscus. 9. Find and record the temperature of the water in the bucket, the temperature of the air in the room and the barometric pressure in the lab.

3 Name: Date PRE-LAB QUESTIONS 1. When the tube is inverted, how does the magnesium react with the acid if the magnesium is at the bottom of the tube and the acid is at the top? Explains what happens and why. 2. How do you know that the reaction has stopped? 3. When reading the gas volume in the tube, what is the purpose of equalizing the water level in the bucket with the water level in the tube? 4. Write the balanced chemical reaction that occurs. 5. Calculate the mass of magnesium metal needed to collect exactly 80 ml of H 2 gas from the reaction above. Assume standard conditions.

4 Name: Date: GAS STOICHIOMETRY 1. Mass of 30 cm of Mg ribbon 2. Mass of Mg needed to produce 40 ml H 2 3. Length of Mg ribbon 4. Volume of 6M HCl 5. Volume of gas produced 6. Water temperature 7. Room temperature 8. Atmospheric pressure CALCULATIONS AND RESULTS 1. What volume of gas were you expecting to collect? 2. Calculate the percent of error between the volume of gas you actually collected and the volume of gas that you were expecting to collect. 3. Which assumption made in your calculations produced the biggest source of error? 4. With the mass of Mg ribbon used, recalculate the volume that you should expect to collect correcting for the error above.

5 5. Calculate the new percent error between the new expected value and the actual volume collected. 6. Although the chemical reaction in this experiment produces only H 2 gas, there was another gas present in the tube. What was it? 7. Why was this gas there? 8. Recalculate your expected volume, accounting for the presence of this "extra gas". 9. Calculate the new percent error between the new expected value and the actual volume collected. 10. What other sources of error could produce this new percent error?

Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Chemicals Needed:

Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Chemicals Needed: Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Your Name: Date: Partner(s) Names: Objectives: React magnesium metal with hydrochloric acid, collecting the hydrogen over water. Calculate the grams

More information

CSUS Department of Chemistry Experiment 8 Chem.1A

CSUS Department of Chemistry Experiment 8 Chem.1A EXPERIMENT #8 Name: PRE-LABORATORY ASSIGNMENT: Lab Section 1. The alkali metals are so reactive that they react directly with water in the absence of acid. For example, potassium reacts with water as follows:

More information

Molar Mass and the Ideal Gas Law Prelab

Molar Mass and the Ideal Gas Law Prelab Molar Mass and the Ideal Gas Law Prelab Name Total /10 SHOW ALL WORK NO WORK = NO CREDIT 1. What is the purpose of this experiment? 2. Determine the mass (in grams) of magnesium metal required to produce

More information

Chemistry 101 Generating Hydrogen Gas

Chemistry 101 Generating Hydrogen Gas Chemistry 101 Generating Hydrogen Gas Objectives To experimentally verify the molar volume of hydrogen gas at STP To gain experience in collecting gas over water Discussion The molar volume of a gas is

More information

Molar Mass of Butane

Molar Mass of Butane Cautions Butane is toxic and flammable. No OPEN Flames should be used in this experiment. Purpose The purpose of this experiment is to determine the molar mass of butane using Dalton s Law of Partial Pressures

More information

Where the exp subscripts refer to the experimental temperature and pressure acquired in the laboratory.

Where the exp subscripts refer to the experimental temperature and pressure acquired in the laboratory. Molar Volume of Carbon Dioxide Reading assignment: Julia Burdge, Chemistry 3rd edition, Chapter 10. Goals To determine the molar volume of carbon dioxide gas and the amount of sodium carbonate in a sample.

More information

Experiment 3 Limiting Reactants

Experiment 3 Limiting Reactants 3-1 Experiment 3 Limiting Reactants Introduction: Most chemical reactions require two or more reactants. Typically, one of the reactants is used up before the other, at which time the reaction stops. The

More information

Determining Equivalent Weight by Copper Electrolysis

Determining Equivalent Weight by Copper Electrolysis Purpose The purpose of this experiment is to determine the equivalent mass of copper based on change in the mass of a copper electrode and the volume of hydrogen gas generated during an electrolysis reaction.

More information

Chemistry 112 Laboratory Experiment 6: The Reaction of Aluminum and Zinc with Hydrochloric Acid

Chemistry 112 Laboratory Experiment 6: The Reaction of Aluminum and Zinc with Hydrochloric Acid Chemistry 112 Laboratory Experiment 6: The Reaction of Aluminum and Zinc with Hydrochloric Acid Introduction Many metals react with acids to form hydrogen gas. In this experiment, you will use the reactions

More information

EXPERIMENT 9 Evaluation of the Universal Gas Constant, R

EXPERIMENT 9 Evaluation of the Universal Gas Constant, R Outcomes EXPERIMENT 9 Evaluation of the Universal Gas Constant, R After completing this experiment, the student should be able to: 1. Determine universal gas constant using reaction of an acid with a metal.

More information

Notes Chapter 9 Limiting Reagent Sample Problems Page 1

Notes Chapter 9 Limiting Reagent Sample Problems Page 1 Notes Chapter 9 Limiting Reagent Sample Problems Page 1 Problem 1: Sodium chloride can be prepared by the reaction of sodium metal with chlorine gas. Suppose that 6.70 Na reacts with 3.20 Cl 2. A. What

More information

The Molar Mass of a Gas

The Molar Mass of a Gas The Molar Mass of a Gas Goals The purpose of this experiment is to determine the number of grams per mole of a gas by measuring the pressure, volume, temperature, and mass of a sample. Terms to Know Molar

More information

Transfer of heat energy often occurs during chemical reactions. A reaction

Transfer of heat energy often occurs during chemical reactions. A reaction Chemistry 111 Lab: Thermochemistry Page I-3 THERMOCHEMISTRY Heats of Reaction The Enthalpy of Formation of Magnesium Oxide Transfer of heat energy often occurs during chemical reactions. A reaction may

More information

Physical and Chemical Properties and Changes

Physical and Chemical Properties and Changes Physical and Chemical Properties and Changes An understanding of material things requires an understanding of the physical and chemical characteristics of matter. A few planned experiments can help you

More information

Properties of Acids and Bases

Properties of Acids and Bases Properties of Acids and Bases (Adapted from Flinn Scientific Acid Base Test Kit I #AP4567) Introduction Battery acid, stomach acid, acid rain just a few acids in our everyday life! What does it mean when

More information

DATE PERFORMED: DATE DUE:

DATE PERFORMED: DATE DUE: Sample lab report The first page is the cover page for the report. Title: Experiment #12 Determination of the Atomic Mass of Zinc ( p 117, Hunt and Block) YOUR NAME: PARTNER(S) NAME: DATE PERFORMED: DATE

More information

EXPERIMENT 12: Empirical Formula of a Compound

EXPERIMENT 12: Empirical Formula of a Compound EXPERIMENT 12: 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 12- Classification of Matter Experiment

Experiment 12- Classification of Matter Experiment Experiment 12- Classification of Matter Experiment Matter can be classified into two groups: mixtures and pure substances. Mixtures are the most common form of matter and consist of mixtures of pure substances.

More information

Properties of Acids and Bases

Properties of Acids and Bases Lab 22 Properties of Acids and Bases TN Standard 4.2: The student will investigate the characteristics of acids and bases. Have you ever brushed your teeth and then drank a glass of orange juice? What

More information

Mixtures and Pure Substances

Mixtures and Pure Substances Unit 2 Mixtures and Pure Substances Matter can be classified into two groups: mixtures and pure substances. Mixtures are the most common form of matter and consist of mixtures of pure substances. They

More information

Determination of the Percentage Oxygen in Air

Determination of the Percentage Oxygen in Air CHEM 121L General Chemistry Laboratory Revision 1.1 Determination of the Percentage Oxygen in Air In this laboratory exercise we will determine the percentage by volume of Oxygen in Air. We will do this

More information

Micro Mole Rockets Hydrogen and Oxygen Mole Ratio As adapted from Flinn ChemTopic- Labs - Molar Relationships & Stoichiometry

Micro Mole Rockets Hydrogen and Oxygen Mole Ratio As adapted from Flinn ChemTopic- Labs - Molar Relationships & Stoichiometry Micro Mole Rockets Hydrogen and Oxygen Mole Ratio As adapted from Flinn ChemTopic- Labs - Molar Relationships & Stoichiometry Introduction The combustion reaction of hydrogen and oxygen is used to produce

More information

EXPERIMENT 8: Activity Series (Single Displacement Reactions)

EXPERIMENT 8: Activity Series (Single Displacement Reactions) EPERIMENT 8: Activity Series (Single Displacement Reactions) PURPOSE a) Reactions of metals with acids and salt solutions b) Determine the activity of metals c) Write a balanced molecular equation, complete

More information

Stoichiometry V = 9.98 L CO2. 34.0 ml H 2 SO 4 soln 6.0 mol H 2 SO. 1000 ml H 2 SO 4 soln. 2 mol CO = 0.408 mol CO 2 1 mol H 2 SO 4

Stoichiometry V = 9.98 L CO2. 34.0 ml H 2 SO 4 soln 6.0 mol H 2 SO. 1000 ml H 2 SO 4 soln. 2 mol CO = 0.408 mol CO 2 1 mol H 2 SO 4 Stoichiometry We cannot count molecules so instead we weigh them; however, it is etremely inconvenient to weigh gases. So, when adding gases to a reaction how do we measure the amount of gas? We use the

More information

Chemistry 12 Worksheet 1-1 - Measuring Reaction Rates

Chemistry 12 Worksheet 1-1 - Measuring Reaction Rates Chemistry 12 Worksheet 1-1 - Measuring Reaction Rates 1. A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is: Zn (s) + 2HCl (aq) oh 2(g)

More information

The volume of a penny will be calculated from its mass and density.

The volume of a penny will be calculated from its mass and density. Measurement and Density In science a key concern is the quantities involved in chemical processes. These amounts can be directly measured or calculated from other measurements. A measurement consists of

More information

Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES

Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES The learning objectives of this experiment are to explore the relationship between the temperature and vapor pressure of water. determine the molar

More information

EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES

EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES Name Section EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to

More information

EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor

EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor Purpose: In this experiment you will use the ideal gas law to calculate the molecular weight of a volatile liquid compound by measuring the mass,

More information

Determination of the Empirical Formula of Magnesium Oxide

Determination of the Empirical Formula of Magnesium Oxide Determination of the Empirical Formula of Magnesium Oxide GOAL AND OVERVIEW The quantitative stoichiometric relationships governing mass and amount will be studied using the combustion reaction of magnesium

More information

Chapter 3 Student Reading

Chapter 3 Student Reading Chapter 3 Student Reading If you hold a solid piece of lead or iron in your hand, it feels heavy for its size. If you hold the same size piece of balsa wood or plastic, it feels light for its size. The

More information

Austin Peay State University Department of Chemistry CHEM 1111. Empirical Formula of a Compound

Austin Peay State University Department of Chemistry CHEM 1111. Empirical Formula of a Compound Cautions Magnesium ribbon is flammable. Nitric acid (HNO 3 ) is toxic, corrosive and contact with eyes or skin may cause severe burns. Ammonia gas (NH 3 ) is toxic and harmful. Hot ceramic crucibles and

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Chapter 10 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) A gas at a pressure of 10.0 Pa exerts a force of N on an area of 5.5 m2. A) 1.8 B) 0.55

More information

Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1

Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1 Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1 FV 6/26/13 MATERIALS: PURPOSE: 1000 ml tall-form beaker, 10 ml graduated cylinder, -10 to 110 o C thermometer, thermometer clamp, plastic pipet, long

More information

Enzyme Pre-Lab. Using the Enzyme worksheet and Enzyme lab handout answer the Pre-Lab questions the pre-lab must be complete before beginning the lab.

Enzyme Pre-Lab. Using the Enzyme worksheet and Enzyme lab handout answer the Pre-Lab questions the pre-lab must be complete before beginning the lab. Enzyme Pre-Lab Using the Enzyme worksheet and Enzyme lab handout answer the Pre-Lab questions the pre-lab must be complete before beginning the lab. Background: In this investigation, you will study several

More information

BLOWING UP BALLOONS, chemically

BLOWING UP BALLOONS, chemically BLOWING UP BALLOONS, chemically PRE LAB DISCUSSION: Today we will be using a closed system. A closed system does not permit matter to enter or exit the apparatus. Lavoisier's classic 12-day experiment,

More information

Heat and Temperature: Teacher s Guide

Heat and Temperature: Teacher s Guide Heat and Temperature: Teacher s Guide Grade Level: 6-8 Curriculum Focus: Physical Science Lesson Duration: Two class periods Program Description Humans have always been feverish about temperature. But

More information

Isolation of Caffeine from Tea

Isolation of Caffeine from Tea Isolation of Caffeine from Tea Introduction A number of interesting, biologically active compounds have been isolated from plants. Isolating some of these natural products, as they are called, can require

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

Thermochemistry I: Endothermic & Exothermic Reactions

Thermochemistry I: Endothermic & Exothermic Reactions THERMOCHEMISTRY I 77 Thermochemistry I: Endothermic & Exothermic Reactions OBJECTIVES: Learn elementary concepts of calorimetry and thermochemistry Practice techniques of careful temperature, mass, and

More information

General Chemistry Lab Experiment 6 Types of Chemical Reaction

General Chemistry Lab Experiment 6 Types of Chemical Reaction General Chemistry Lab Experiment 6 Types of Chemical Reaction Introduction Most ordinary chemical reactions can be classified as one of five basic types. The first type of reaction occurs when two or more

More information

PRE-LAB FOR YEAST RESPIRATION AND FERMENTATION

PRE-LAB FOR YEAST RESPIRATION AND FERMENTATION PRE-LAB FOR YEAST RESPIRATION AND FERMENTATION PURPOSE: To identify the products of yeast cultures grown under aerobic and anaerobic conditions STUDENTS' ENTERING COMPETENCIES: Before doing this lab, students

More information

Recovery of Elemental Copper from Copper (II) Nitrate

Recovery of Elemental Copper from Copper (II) Nitrate Recovery of Elemental Copper from Copper (II) Nitrate Objectives: Challenge: Students should be able to - recognize evidence(s) of a chemical change - convert word equations into formula equations - perform

More information

Materials 10-mL graduated cylinder l or 2-L beaker, preferably tall-form Thermometer

Materials 10-mL graduated cylinder l or 2-L beaker, preferably tall-form Thermometer VAPOR PRESSURE OF WATER Introduction At very low temperatures (temperatures near the freezing point), the rate of evaporation of water (or any liquid) is negligible. But as its temperature increases, more

More information

Stoichiometry: Baking Soda and Vinegar Reactions

Stoichiometry: Baking Soda and Vinegar Reactions Stoichiometry: Baking Soda and Vinegar Reactions California Science Content Standards: Teacher Version 3. Conservation of Matter and Stoichiometry: The conservation of atoms in chemical reactions leads

More information

7. 1.00 atm = 760 torr = 760 mm Hg = 101.325 kpa = 14.70 psi. = 0.446 atm. = 0.993 atm. = 107 kpa 760 torr 1 atm 760 mm Hg = 790.

7. 1.00 atm = 760 torr = 760 mm Hg = 101.325 kpa = 14.70 psi. = 0.446 atm. = 0.993 atm. = 107 kpa 760 torr 1 atm 760 mm Hg = 790. CHATER 3. The atmosphere is a homogeneous mixture (a solution) of gases.. Solids and liquids have essentially fixed volumes and are not able to be compressed easily. have volumes that depend on their conditions,

More information

CH3 Stoichiometry. The violent chemical reaction of bromine and phosphorus. P.76

CH3 Stoichiometry. The violent chemical reaction of bromine and phosphorus. P.76 CH3 Stoichiometry The violent chemical reaction of bromine and phosphorus. P.76 Contents 3.1 Counting by Weighing 3.2 Atomic Masses 3.3 The Mole 3.4 Molar Mass 3.5 Percent Composition of Compounds 3.6

More information

Endothermic and Exothermic Reactions. Evaluation copy. Mg(s) + 2 HCl(aq) H 2 (g) + MgCl 2 (aq)

Endothermic and Exothermic Reactions. Evaluation copy. Mg(s) + 2 HCl(aq) H 2 (g) + MgCl 2 (aq) Endothermic and Exothermic Reactions Computer 1 Many chemical reactions give off energy. Chemical reactions that release energy are called exothermic reactions. Some chemical reactions absorb energy and

More information

Experiment 6 Coffee-cup Calorimetry

Experiment 6 Coffee-cup Calorimetry 6-1 Experiment 6 Coffee-cup Calorimetry Introduction: Chemical reactions involve the release or consumption of energy, usually in the form of heat. Heat is measured in the energy units, Joules (J), defined

More information

Thermochemistry: Calorimetry and Hess s Law

Thermochemistry: Calorimetry and Hess s Law Thermochemistry: Calorimetry and Hess s Law Some chemical reactions are endothermic and proceed with absorption of heat while others are exothermic and proceed with an evolution of heat. The magnitude

More information

Teacher Demo: Photosynthesis and Respiration: Complementary Processes

Teacher Demo: Photosynthesis and Respiration: Complementary Processes SNC1D/1P Sustainable Ecosystems/ Sustainable Ecosystems and Human Activity Teacher Demo: Photosynthesis and Respiration: Complementary Processes Topics photosynthesis and respiration gas tests for oxygen

More information

PREPARATION FOR CHEMISTRY LAB: COMBUSTION

PREPARATION FOR CHEMISTRY LAB: COMBUSTION 1 Name: Lab Instructor: PREPARATION FOR CHEMISTRY LAB: COMBUSTION 1. What is a hydrocarbon? 2. What products form in the complete combustion of a hydrocarbon? 3. Combustion is an exothermic reaction. What

More information

Experiment 13H THE REACTION OF RED FOOD COLOR WITH BLEACH 1

Experiment 13H THE REACTION OF RED FOOD COLOR WITH BLEACH 1 Experiment 13H FV 1/25/2011(2-run) THE REACTION OF RED FOOD COLOR WITH BLEACH 1 PROBLEM: Determine the rate law for the chemical reaction between FD&C Red Dye #3 and sodium hypochlorite. LEARNING OBJECTIVES:

More information

IB Chemistry. DP Chemistry Review

IB Chemistry. DP Chemistry Review DP Chemistry Review Topic 1: Quantitative chemistry 1.1 The mole concept and Avogadro s constant Assessment statement Apply the mole concept to substances. Determine the number of particles and the amount

More information

SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB

SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB Purpose: Most ionic compounds are considered by chemists to be salts and many of these are water soluble. In this lab, you will determine the solubility,

More information

Acid Base Titrations

Acid Base Titrations Acid Base Titrations Introduction A common question chemists have to answer is how much of something is present in a sample or a product. If the product contains an acid or base, this question is usually

More information

Remember the best arguments are based on the strongest evidence and can explain why opposing arguments are incorrect.

Remember the best arguments are based on the strongest evidence and can explain why opposing arguments are incorrect. Magnesium and carbon dioxide Student sheet Burning magnesium in carbon dioxide what will happen? Either the magnesium will go out or it will continue to burn. Which will it be? You will use the evidence

More information

DETERMINING THE MOLAR MASS OF CARBON DIOXIDE

DETERMINING THE MOLAR MASS OF CARBON DIOXIDE DETERMINING THE MOLAR MASS OF CARBON DIOXIDE PURPOSE: The goal of the experiment is to determine the molar mass of carbon dioxide and compare the experimentally determined value to the theoretical value.

More information

CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD KEY

CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD KEY CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD Objective To gain familiarity with basic laboratory procedures, some chemistry of a typical transition element, and the concept of percent yield. Apparatus

More information

CHEMICAL FORMULAS AND EQUATIONS

CHEMICAL FORMULAS AND EQUATIONS reflect Imagine that you and three other classmates had enough supplies and the recipe to make one pepperoni pizza. The recipe might include a ball of dough, a cup of pizza sauce, a cup of cheese, and

More information

Experiment 5. Chemical Reactions A + X AX AX A + X A + BX AX + B AZ + BX AX + BZ

Experiment 5. Chemical Reactions A + X AX AX A + X A + BX AX + B AZ + BX AX + BZ Experiment 5 Chemical Reactions OBJECTIVES 1. To observe the various criteria that are used to indicate that a chemical reaction has occurred. 2. To convert word equations into balanced inorganic chemical

More information

Name Class Date. Section: Calculating Quantities in Reactions. Complete each statement below by writing the correct term or phrase.

Name Class Date. Section: Calculating Quantities in Reactions. Complete each statement below by writing the correct term or phrase. Skills Worksheet Concept Review Section: Calculating Quantities in Reactions Complete each statement below by writing the correct term or phrase. 1. All stoichiometric calculations involving equations

More information

The Electrical Control of Chemical Reactions E3-1

The Electrical Control of Chemical Reactions E3-1 Experiment 3 The Electrical Control of Chemical Reactions E3-1 E3-2 The Task In this experiment you will explore the processes of oxidation and reduction, in which electrons flow between materials, and

More information

Experiment 16-Acids, Bases and ph

Experiment 16-Acids, Bases and ph Definitions acid-an ionic compound that releases or reacts with water to form hydrogen ion (H + ) in aqueous solution. They taste sour and turn litmus red. Acids react with certain metals such as zinc,

More information

CH110 Lab 3. Chemical Reactions (W14) 23

CH110 Lab 3. Chemical Reactions (W14) 23 LAB 3. CHEMICAL REACTIONS: CHEMICAL PROPERTIES AND EQUATIONS PURPOSE: To perform and recognize different types of chemical reactions. To complete and balance chemical equations. To test the Law of Conservation

More information

4.3 Reaction Stoichiometry

4.3 Reaction Stoichiometry 196 Chapter 4 Stoichiometry of Chemical Reactions 4.3 Reaction Stoichiometry By the end of this section, you will be able to: Explain the concept of stoichiometry as it pertains to chemical reactions Use

More information

= 1.038 atm. 760 mm Hg. = 0.989 atm. d. 767 torr = 767 mm Hg. = 1.01 atm

= 1.038 atm. 760 mm Hg. = 0.989 atm. d. 767 torr = 767 mm Hg. = 1.01 atm Chapter 13 Gases 1. Solids and liquids have essentially fixed volumes and are not able to be compressed easily. Gases have volumes that depend on their conditions, and can be compressed or expanded by

More information

Oxidation States of Copper Two forms of copper oxide are found in nature, copper(i) oxide and copper(ii) oxide.

Oxidation States of Copper Two forms of copper oxide are found in nature, copper(i) oxide and copper(ii) oxide. The Empirical Formula of a Copper Oxide Reading assignment: Chang, Chemistry 10 th edition, pp. 55-58. Goals The reaction of hydrogen gas with a copper oxide compound will be studied quantitatively. By

More information

1. The Determination of Boiling Point

1. The Determination of Boiling Point 1. The Determination of Boiling Point Objective In this experiment, you will first check your thermometer for errors by determining the temperature of two stable equilibrium systems. You will then use

More information

Bottle Rockets. Vanderbilt Student Volunteers for Science. Fall 2008

Bottle Rockets. Vanderbilt Student Volunteers for Science. Fall 2008 Bottle Rockets Vanderbilt Student Volunteers for Science Fall 2008 I. Introduction: History of Rockets Explain to the students that rockets are more than two thousand years old. Give the students a BRIEF

More information

Percentage of Water in Popcorn

Percentage of Water in Popcorn Skills Practice DATASHEET FOR IN-TEXT LAB Percentage of Water in Popcorn Popcorn pops because of the natural moisture inside each kernel. When the internal water is heated above 100 C, the liquid water

More information

Figure 1. A voltaic cell Cu,Cu 2+ Ag +, Ag. gas is, by convention, assigned a reduction potential of 0.00 V.

Figure 1. A voltaic cell Cu,Cu 2+ Ag +, Ag. gas is, by convention, assigned a reduction potential of 0.00 V. Voltaic Cells Introduction In this lab you will first prepare a set of simple standard half-cells and then measure the voltage between the half-cells with a voltmeter. From this data you will be able to

More information

1. What is the molecular formula of a compound with the empirical formula PO and a gram-molecular mass of 284 grams?

1. What is the molecular formula of a compound with the empirical formula PO and a gram-molecular mass of 284 grams? Name: Tuesday, May 20, 2008 1. What is the molecular formula of a compound with the empirical formula PO and a gram-molecular mass of 284 grams? 2 5 1. P2O 5 3. P10O4 2. P5O 2 4. P4O10 2. Which substance

More information

Instructions Answer all questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want to be marked.

Instructions Answer all questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want to be marked. GCSE CHEMISTRY Higher Tier Chemistry 1H H Specimen 2018 Time allowed: 1 hour 45 minutes Materials For this paper you must have: a ruler a calculator the periodic table (enclosed). Instructions Answer all

More information

Return to Lab Menu. Stoichiometry Exploring the Reaction between Baking Soda and Vinegar

Return to Lab Menu. Stoichiometry Exploring the Reaction between Baking Soda and Vinegar Return to Lab Menu Stoichiometry Exploring the Reaction between Baking Soda and Vinegar Objectives -to observe and measure mass loss in a gas forming reaction -to calculate CO 2 loss and correlate to a

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 and observe the results of a variety of chemical reactions. To become familiar with the observable signs of chemical

More information

Tutorial 4 SOLUTION STOICHIOMETRY. Solution stoichiometry calculations involve chemical reactions taking place in solution.

Tutorial 4 SOLUTION STOICHIOMETRY. Solution stoichiometry calculations involve chemical reactions taking place in solution. T-27 Tutorial 4 SOLUTION STOICHIOMETRY Solution stoichiometry calculations involve chemical reactions taking place in solution. Of the various methods of expressing solution concentration the most convenient

More information

Sugar or Salt? Ionic and Covalent Bonds

Sugar or Salt? Ionic and Covalent Bonds Lab 11 Sugar or Salt? Ionic and Covalent Bonds TN Standard 2.1: The student will investigate chemical bonding. Have you ever accidentally used salt instead of sugar? D rinking tea that has been sweetened

More information

Stoichiometry Review

Stoichiometry Review Stoichiometry Review There are 20 problems in this review set. Answers, including problem set-up, can be found in the second half of this document. 1. N 2 (g) + 3H 2 (g) --------> 2NH 3 (g) a. nitrogen

More information

Enzyme Action: Testing Catalase Activity

Enzyme Action: Testing Catalase Activity Enzyme Action: Testing Catalase Activity DataQuest 12 Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the chemical activities

More information

Enzyme Action: Testing Catalase Activity 50 Points

Enzyme Action: Testing Catalase Activity 50 Points Names: LabQuest Enzyme Action: Testing Catalase Activity 50 Points 6A Many organisms can decompose hydrogen peroxide (H 2 O 2 ) enzymatically. Enzymes are globular proteins, responsible for most of the

More information

Chemical Changes. Measuring a Chemical Reaction. Name(s)

Chemical Changes. Measuring a Chemical Reaction. Name(s) Chemical Changes Name(s) In the particle model of matter, individual atoms can be bound tightly to other atoms to form molecules. For example, water molecules are made up of two hydrogen atoms bound to

More information

Molarity of Ions in Solution

Molarity of Ions in Solution APPENDIX A Molarity of Ions in Solution ften it is necessary to calculate not only the concentration (in molarity) of a compound in aqueous solution but also the concentration of each ion in aqueous solution.

More information

Extraction: Separation of Acidic Substances

Extraction: Separation of Acidic Substances Extraction: Separation of Acidic Substances Chemists frequently find it necessary to separate a mixture of compounds by moving a component from one solution or mixture to another. The process most often

More information

Dissolving of sodium hydroxide generates heat. Take care in handling the dilution container.

Dissolving of sodium hydroxide generates heat. Take care in handling the dilution container. TITRATION: STANDARDIZATION OF A BASE AND ANALYSIS OF STOMACH ANTACID TABLETS 2009, 1996, 1973 by David A. Katz. All rights reserved. Reproduction permitted for education use provided original copyright

More information

Determination of Molar Mass by Boiling Point Elevation of Urea Solution

Determination of Molar Mass by Boiling Point Elevation of Urea Solution Determination of Molar Mass by Boiling Point Elevation of Urea Solution CHRISTIAN E. MADU, PhD AND BASSAM ATTILI, PhD COLLIN COLLEGE CHEMISTRY DEPARTMENT Purpose of the Experiment Determine the boiling

More information

The Influence of Carbon Dioxide on Algae Growth

The Influence of Carbon Dioxide on Algae Growth The Influence of Carbon Dioxide on Algae Growth The first objective of this experiment is to show that increased atmospheric concentrations of carbon dioxide, CO 2, can stimulate algae growth. The second

More information

Determination of Citric Acid in Powdered Drink Mixes

Determination of Citric Acid in Powdered Drink Mixes Determination of Citric Acid in Powdered Drink Mixes Citric acid and its salts (sodium citrate and potassium citrate) are found in many foods, drinks, pharmaceuticals, shampoos, and cosmetics. The tartness

More information

Investigation M3: Separating Mixtures into Component Parts

Investigation M3: Separating Mixtures into Component Parts Investigation M3: Separating Mixtures into Component Parts Goals: Use various methods to separate mixtures, make inferences from temperature/time graphs, and identify substances. 81 Activity M3.3: What

More information

Ascorbic Acid Titration of Vitamin C Tablets This lab will be completed individually! Make sure you come prepared!

Ascorbic Acid Titration of Vitamin C Tablets This lab will be completed individually! Make sure you come prepared! Ascorbic Acid Titration of Vitamin C Tablets This lab will be completed individually! Make sure you come prepared! Introduction Vitamin C (also known as ascorbic acid, HC6H7O6) is a necessary ingredient

More information

Can Gases Act Like a Greenhouse?

Can Gases Act Like a Greenhouse? Can Gases Act Like a Greenhouse? Activity 1 Following a discussion that enables student to express what they already know about the greenhouse effect, students conduct a controlled experiment to confirm

More information

PREPARATION AND PROPERTIES OF A SOAP

PREPARATION AND PROPERTIES OF A SOAP (adapted from Blackburn et al., Laboratory Manual to Accompany World of Chemistry, 2 nd ed., (1996) Saunders College Publishing: Fort Worth) Purpose: To prepare a sample of soap and to examine its properties.

More information

Lab Manual Introductory Chemistry: A Green Approach Version 4.1. 2010, escience Labs, Inc. All rights reserved esciencelabs.com 888.375.

Lab Manual Introductory Chemistry: A Green Approach Version 4.1. 2010, escience Labs, Inc. All rights reserved esciencelabs.com 888.375. Lab Manual Introductory Chemistry: A Green Approach Version 4.1 2010, escience Labs, Inc. All rights reserved esciencelabs.com 888.375.5487 Table of Contents Lab 1: Introduc on and Safety Lab 2: The Scien

More information

Part B 2. Allow a total of 15 credits for this part. The student must answer all questions in this part.

Part B 2. Allow a total of 15 credits for this part. The student must answer all questions in this part. Part B 2 Allow a total of 15 credits for this part. The student must answer all questions in this part. 51 [1] Allow 1 credit for 3 Mg(s) N 2 (g) Mg 3 N 2 (s). Allow credit even if the coefficient 1 is

More information

11-1 Stoichiometry. Represents

11-1 Stoichiometry. Represents 11-1 Stoichiometry What is stoichiometry? Calculations that relate the quantities of substances. It is the study of quantitative (measurable amounts) relationships in chemical reactions and equations.

More information

Determination of a Chemical Formula

Determination of a Chemical Formula 1 Determination of a Chemical Formula Introduction Molar Ratios Elements combine in fixed ratios to form compounds. For example, consider the compound TiCl 4 (titanium chloride). Each molecule of TiCl

More information

DETERMINING THE ENTHALPY OF FORMATION OF CaCO 3

DETERMINING THE ENTHALPY OF FORMATION OF CaCO 3 DETERMINING THE ENTHALPY OF FORMATION OF CaCO 3 Standard Enthalpy Change Standard Enthalpy Change for a reaction, symbolized as H 0 298, is defined as The enthalpy change when the molar quantities of reactants

More information

Experiment 8 Synthesis of Aspirin

Experiment 8 Synthesis of Aspirin Experiment 8 Synthesis of Aspirin Aspirin is an effective analgesic (pain reliever), antipyretic (fever reducer) and anti-inflammatory agent and is one of the most widely used non-prescription drugs. The

More information

Chemistry Ch 15 (Solutions) Study Guide Introduction

Chemistry Ch 15 (Solutions) Study Guide Introduction Chemistry Ch 15 (Solutions) Study Guide Introduction Name: Note: a word marked (?) is a vocabulary word you should know the meaning of. A homogeneous (?) mixture, or, is a mixture in which the individual

More information

QUESTION (2012:3) (a) (i) Complete the table below showing the conjugate acids and bases. CO 3 H 2 O OH HCN CN -

QUESTION (2012:3) (a) (i) Complete the table below showing the conjugate acids and bases. CO 3 H 2 O OH HCN CN - QUESTION (2012:3) (i) Complete the table below showing the conjugate acids and bases. Conjugate acid Conjugate base - HCO 3 2 CO 3 H 2 O OH HCN CN - (ii) HPO 4 2 (aq) Write equations for the reactions

More information