# STOICHIOMETRY: The Reaction of Iron with Copper (II) Sulfate

Size: px
Start display at page:

Download "STOICHIOMETRY: The Reaction of Iron with Copper (II) Sulfate"

## Transcription

1 STOICHIOMETRY: The Reaction of Iron with Copper (II) Sulfate Introduction In this experiment we will use stoichiometric principles to deduce the appropriate equation for the reaction between metallic iron and a solution of copper (II) sulfate. This reaction produces metallic copper, which is seen precipitating as a finely divided red powder. This type of reaction, in which one metal "displaces" another from a solution of one of its salts, is known as a single substitution reaction. A metal capable of displacing another from a solution of one of its salts is said to be "more active" than the displaced metal. In this experiment, iron is more active than copper. Iron forms 2 types of ions, namely Fe +2 and Fe +3. We shall use stoichiometric principles to determine which of these ions is formed in the reaction between iron and copper (II) sulfate solution. If Fe +2 is formed, then equation (1) is correct, while equation (2) is correct if Fe +3 is formed. Your task is to find out which equation is consistent with the results of your experiment. (1) Fe (s) + CuSO 4 (aq)! FeSO 4 (aq) + Cu (s) Fe (s) + Cu +2 (aq)! Fe+2 (aq) + Cu (s) (2) 2Fe (s) + 3CuSO 4 (aq)! Fe 2 (SO 4 ) 3 (aq) + 3Cu (s) 2Fe (s) + 3Cu +2 (aq)! 2Fe+3 (aq) + 3Cu (s) An excess of copper (II) sulfate solution (to make sure that all the iron is reacted) will be added to a known amount of iron. The metallic copper produced will be weighed. These weighings will be used to calculate the moles of iron used and the moles of copper formed. If equation (1) is correct, the moles of copper should equal the moles of iron. If equation (2) is correct, we should obtain 1.5 moles of copper per mole of iron.

3 Data and Calculations Name Section TRIAL 1 TRIAL2 Mass of Empty Beaker Mass of Beaker Plus Iron Mass of Iron Used Moles of Iron Used Mass of Beaker Plus Copper Mass of Copper Formed Moles of Copper Formed Ratio: Moles of Cu : Moles of Fe (Divide moles of Cu by moles of Fe) Calculation Work

4 Results 1. From your data, which equation (1) or (2) gives the correct stoichiometry for this reaction? Explain your answer. 2. What evidence indicates that a chemical reaction has occurred? 3. State two reasons why you may not recover the theoretical amount of copper in this experiment.

5 Prestudy Name Section The Reaction of Iron with Copper (II) Sulfate Copper can form two possible cations, cuprous (Cu +1 ) and cupric (Cu +2 ). When solid copper is reacted with a silver nitrate solution, two reactions are possible, as shown in the following equations: a. AgNO 3 (aq) + Cu (s)! Ag (s) + CuNO 3 (aq) Ag +1 (aq) + Cu (s)! Ag (s) + Cu+1 (aq) b. 2AgNO 3 (aq) + Cu (s)! 2Ag (s) + Cu(NO 3 ) 2 (aq) 2Ag +1 (aq) + Cu (s)! 2Ag (s) + Cu+2 (aq) 1.(3 points) How many grams of metallic silver can form from g of copper metal according to equation (a)? 2.(3 points) How many grams of metallic silver can form from g of copper metal according to equation (b)? 3.(4 points) A student reacts grams of copper with a solution containing excess silver nitrate and recovers g of silver metal. Which reaction, (a) or (b), most likely occurred in his experiment? Explain your answer completely.

### 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

### 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

### The Empirical Formula of a Compound

The Empirical Formula of a Compound Lab #5 Introduction A look at the mass relationships in chemistry reveals little order or sense. The ratio of the masses of the elements in a compound, while constant,

### 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

### 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

### Electrochemistry Voltaic Cells

Electrochemistry Voltaic Cells Many chemical reactions can be classified as oxidation-reduction or redox reactions. In these reactions one species loses electrons or is oxidized while another species gains

### General Chemistry I (FC, 09-10) Lab #3: The Empirical Formula of a Compound. Introduction

General Chemistry I (FC, 09-10) Introduction A look at the mass relationships in chemistry reveals little order or sense. The ratio of the masses of the elements in a compound, while constant, does not

### Calcium Analysis by EDTA Titration

Calcium Analysis by EDTA Titration ne of the factors that establish the quality of a water supply is its degree of hardness. The hardness of water is defined in terms of its content of calcium and magnesium

### Newton s Chymistry of Metal Solubilities

Newton s Chymistry of Metal Solubilities Introduction and Background Sir Isaac Newton (1642-1727) is a famous name, of course, but few people realize that the man who discovered the law of universal gravitation,

### Experiment 7: Titration of an Antacid

1 Experiment 7: Titration of an Antacid Objective: In this experiment, you will standardize a solution of base using the analytical technique known as titration. Using this standardized solution, you will

### 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

### EXPERIMENT 7 Electrochemical Cells: A Discovery Exercise 1. Introduction. Discussion

EXPERIMENT 7 Electrochemical Cells: A Discovery Exercise 1 Introduction This lab is designed for you to discover the properties of electrochemical cells. It requires little previous knowledge of electrochemical

### EXPERIMENT 12 A SOLUBILITY PRODUCT CONSTANT

PURPOSE: 1. To determine experimentally the molar solubility of potassium acid tartrate in water and in a solution of potassium nitrate. 2. To examine the effect of a common ion on the solubility of slightly

### 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

### PHYSICAL SEPARATION TECHNIQUES. Introduction

PHYSICAL SEPARATION TECHNIQUES Lab #2 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

### Coordination Compounds with Copper (II) Prelab (Week 2)

Coordination Compounds with Copper (II) Prelab (Week 2) Name Total /10 SHOW ALL WORK NO WORK = NO CREDIT 1. What is the purpose of this experiment? 2. Write the generic chemical formula for the coordination

### Solubility Product Constants

Solubility Product Constants PURPOSE To measure the solubility product constant (K sp ) of copper (II) iodate, Cu(IO 3 ) 2. GOALS 1 To measure the molar solubility of a sparingly soluble salt in water.

### OXIDATION-REDUCTION TITRATIONS-Permanganometry

Experiment No. Date OXIDATION-REDUCTION TITRATIONS-Permanganometry INTRODUCTION Potassium permanganate, KMnO 4, is probably the most widely used of all volumetric oxidizing agents. It is a powerful oxidant

### Stoichiometry Limiting Reagent Laboratory. Chemistry 118 Laboratory University of Massachusetts, Boston

Chemistry 118 Laboratory University of Massachusetts, Boston STOICHIOMETRY - LIMITING REAGENT --------------------------------------------------------------------------------------------------------------------------------------------

### experiment5 Understanding and applying the concept of limiting reagents. Learning how to perform a vacuum filtration.

81 experiment5 LECTURE AND LAB SKILLS EMPHASIZED Synthesizing an organic substance. Understanding and applying the concept of limiting reagents. Determining percent yield. Learning how to perform a vacuum

### Hands-On Labs SM-1 Lab Manual

EXPERIMENT 4: Separation of a Mixture of Solids Read the entire experiment and organize time, materials, and work space before beginning. Remember to review the safety sections and wear goggles when appropriate.

### 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

### 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

### 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

### TITRATION OF VITAMIN C

TITRATION OF VITAMIN C Introduction: In this lab, we will be performing two different types of titrations on ascorbic acid, more commonly known as Vitamin C. The first will be an acid-base titration in

### STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION EXPERIMENT 14

STANDARDIZATION OF A SODIUM HYDROXIDE SOLUTION EXPERIMENT 14 OBJECTIVE The objective of this experiment will be the standardization of sodium hydroxide using potassium hydrogen phthalate by the titration

### Honors Chemistry: Unit 6 Test Stoichiometry PRACTICE TEST ANSWER KEY Page 1. A chemical equation. (C-4.4)

Honors Chemistry: Unit 6 Test Stoichiometry PRACTICE TEST ANSWER KEY Page 1 1. 2. 3. 4. 5. 6. Question What is a symbolic representation of a chemical reaction? What 3 things (values) is a mole of a chemical

### AN EXPERIMENT IN ALCHEMY: COPPER TO SILVER TO GOLD 2005, 2000, 1996 by David A. Katz. All rights reserved

AN EXPERIMENT IN ALCHEMY: COPPER TO SILVER TO GOLD 2005, 2000, 1996 by David A. Katz. All rights reserved INTRODUCTION One of the goals of the ancient alchemists was to convert base metals into gold. Although

### Lab #13: Qualitative Analysis of Cations and Anions

Lab #13: Qualitative Analysis of Cations and Anions Objectives: 1. To understand the rationale and the procedure behind the separation for various cations and anions. 2. To perform qualitative analysis

### 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

### 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.

### Stoichiometry Limiting Reagent Laboratory. Chemistry 118 Laboratory University of Massachusetts, Boston

Chemistry 118 Laboratory University of Massachusetts, Boston STOICHIOMETRY - LIMITING REAGENT -----------------------------------------------------------------------------------------------------------------------------

### 1. Qualitative Analysis of Chromium, Iron, and Copper

1. Qualitative Analysis of Chromium, Iron, and Copper Introduction We have used copper and iron as basic materials since the Bronze and Iron Ages, but our extensive use of chromium began only after the

### 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

### SYNTHESIS AND ANALYSIS OF A COORDINATION COMPOUND OF COPPER

Chemistry 111 Lab: Synthesis of a Copper Complex Page H-1 SYNTHESIS AND ANALYSIS OF A COORDINATION COMPOUND OF COPPER In this experiment you will synthesize a compound by adding NH 3 to a concentrated

### 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

### Building Electrochemical Cells

Cautions Heavy metals, such as lead, and solutions of heavy metals may be toxic and an irritant. Purpose To determine the cell potential (E cell ) for various voltaic cells and compare the data with the

### 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

### 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

### Experiment 8 Preparation of Cyclohexanone by Hypochlorite Oxidation

Experiment 8 Preparation of Cyclohexanone by ypochlorite xidation In this experiment we will prepare cyclohexanone from cyclohexanol using hypochlorite oxidation. We will use common household bleach that

### 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.

### Separation by Solvent Extraction

Experiment 3 Separation by Solvent Extraction Objectives To separate a mixture consisting of a carboxylic acid and a neutral compound by using solvent extraction techniques. Introduction Frequently, organic

### Electrochemical Half Cells and Reactions

Suggested reading: Chang text pages 81 89 Cautions Heavy metals, such as lead, and solutions of heavy metals may be toxic and an irritant. Purpose To determine the cell potential (E cell ) for various

### Preparation of an Alum

Preparation of an Alum Pages 75 84 Pre-lab = pages 81 to 82, all questions No lab questions, a lab report is required by the start of the next lab What is an alum? They are white crystalline double sulfates

### CHEM 2423 Recrystallization of Benzoic Acid EXPERIMENT 4 - Purification - Recrystallization of Benzoic acid

EXPERIMENT 4 - Purification - Recrystallization of Benzoic acid Purpose: a) To purify samples of organic compounds that are solids at room temperature b) To dissociate the impure sample in the minimum

### Mass of thoroughly dried filter paper. Mass of filter paper + precipitate after third drying. Mass of filter paper + precipitate after second drying

Mass of KI tablet Mass of thoroughly dried filter paper Mass of filter paper + precipitate after first drying Mass of filter paper + precipitate after second drying Mass of filter paper + precipitate after

### Experiment 8 - Double Displacement Reactions

Experiment 8 - Double Displacement Reactions A double displacement reaction involves two ionic compounds that are dissolved in water. In a double displacement reaction, it appears as though the ions are

### 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

### 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

### Paper Chromatography: Separation and Identification of Five Metal Cations

Paper Chromatography: Separation and Identification of Five Metal Cations Objectives Known and unknown solutions of the metal ions Ag +, Fe 3+, Co 2+, Cu 2+ and Hg 2+ will be analyzed using paper chromatography.

### Determination of the Amount of Acid Neutralized by an Antacid Tablet Using Back Titration

Determination of the Amount of Acid Neutralized by an Antacid Tablet Using Back Titration GOAL AND OVERVIEW Antacids are bases that react stoichiometrically with acid. The number of moles of acid that

### 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

### Lab #10 How much Acetic Acid (%) is in Vinegar?

Lab #10 How much Acetic Acid (%) is in Vinegar? SAMPLE CALCULATIONS NEED TO BE DONE BEFORE LAB MEETS!!!! Purpose: You will determine the amount of acetic acid in white vinegar (sold in grocery stores)

### 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

### In this experiment, we will use three properties to identify a liquid substance: solubility, density and boiling point..

Identification of a Substance by Physical Properties 2009 by David A. Katz. All rights reserved. Permission for academic use provided the original copyright is included Every substance has a unique set

### Determining the Quantity of Iron in a Vitamin Tablet. Evaluation copy

Determining the Quantity of Iron in a Vitamin Tablet Computer 34 As biochemical research becomes more sophisticated, we are learning more about the role of metallic elements in the human body. For example,

### 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

### 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

### Physical Properties of a Pure Substance, Water

Physical Properties of a Pure Substance, Water The chemical and physical properties of a substance characterize it as a unique substance, and the determination of these properties can often allow one to

### Analyzing the Acid in Vinegar

Analyzing the Acid in Vinegar Purpose: This experiment will analyze the percentage of acetic acid in store bought vinegar using titration. Introduction: Vinegar can be found in almost any home. It can

### 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.

### 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

### Experiment #10: Liquids, Liquid Mixtures and Solutions

Experiment #10: Liquids, Liquid Mixtures and Solutions Objectives: This experiment is a broad survey of the physical properties of liquids. We will investigate solvent/solute mixtures. We will study and

### CH204 Experiment 2. Experiment 1 Post-Game Show. Experiment 1 Post-Game Show continued... Dr. Brian Anderson Fall 2008

CH204 Experiment 2 Dr. Brian Anderson Fall 2008 Experiment 1 Post-Game Show pipette and burette intensive and extensive properties interpolation determining random experimental error What about gross error

### Determination of calcium by Standardized EDTA Solution

Determination of calcium by Standardized EDTA Solution Introduction The classic method of determining calcium and other suitable cations is titration with a standardized solution of ethylenediaminetetraacetic

### 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

### Chem 1100 Chapter Three Study Guide Answers Outline I. Molar Mass and Moles A. Calculations of Molar Masses

Chem 1100 Chapter Three Study Guide Answers Outline I. Molar Mass and Moles A. Calculations of Molar Masses B. Calculations of moles C. Calculations of number of atoms from moles/molar masses 1. Avagadro

### 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

### Solubility Curve of Sugar in Water

Solubility Curve of Sugar in Water INTRODUCTION Solutions are homogeneous mixtures of solvents (the larger volume of the mixture) and solutes (the smaller volume of the mixture). For example, a hot chocolate

### EDTA Titrations 1: Standardization of EDTA and Analysis of Zinc in a Supplement Tablet. by Professor David Cash. September, 2008

CHEMICAL, ENVIRONMENTAL, AND BIOTECHNOLOGY DEPARTMENT EDTA Titrations 1: Standardization of EDTA and Analysis of Zinc in a Supplement Tablet by Professor David Cash September, 2008 Mohawk College is the

### Additional Lecture: TITRATION BASICS

Additional Lecture: TITRATION BASICS 1 Definition and Applications Titration is the incremental addition of a reagent solution (called titrant) to the analyte until the reaction is complete Common applications:

### 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

### Precipitation Titration: Determination of Chloride by the Mohr Method by Dr. Deniz Korkmaz

Precipitation Titration: Determination of Chloride by the Mohr Method by Dr. Deniz Korkmaz Introduction Titration is a process by which the concentration of an unknown substance in solution is determined

### ELECTROCHEMICAL CELLS LAB

ELECTROCHEMICAL CELLS LAB Purpose: The purpose of this lab is to demonstrate the ability of chemistry to make electric current using oxidation/reduction (REDOX) reactions, and to measure the electric current

### (1) Hydrochloric acid reacts with sodium hypochlorite to form hypochlorous acid: NaOCl(aq) + HCl(aq) HOCl(aq) + NaCl(aq) hypochlorous acid

The Determination of Hypochlorite in Bleach Reading assignment: Chang, Chemistry 10 th edition, pages 156-159. We will study an example of a redox titration in order to determine the concentration of sodium

### Saturated NaCl solution rubber tubing (2) Glass adaptor (2) thermometer adaptor heating mantle

EXPERIMENT 5 (Organic Chemistry II) Pahlavan/Cherif Dehydration of Alcohols - Dehydration of Cyclohexanol Purpose - The purpose of this lab is to produce cyclohexene through the acid catalyzed elimination

### SEPARATION OF A MIXTURE OF SUBSTANCES LAB

SEPARATION OF A MIXTURE OF SUBSTANCES LAB Purpose: Every chemical has a set of defined physical properties, and when combined they present a unique fingerprint for that chemical. When chemicals are present

### Experiment 8: Chemical Moles: Converting Baking Soda to Table Salt

Experiment 8: Chemical Moles: Converting Baking Soda to Table Salt What is the purpose of this lab? We want to develop a model that shows in a simple way the relationship between the amounts of reactants

### Solubility Product. Application of Equilibrium concepts

Solubility Product Application of Equilibrium concepts Introduction In even the most insoluble compounds, a few ions at the least dissolve. We can treat dissolving as a mini reaction in which the cation(s)

### 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

### Experiment 5 Preparation of Cyclohexene

Experiment 5 Preparation of yclohexene In this experiment we will prepare cyclohexene from cyclohexanol using an acid catalyzed dehydration reaction. We will use the cyclohexanol that we purified in our

### EXPERIMENT 10: TITRATION AND STANDARDIZATION

EXPERIMENT 10: TITRATION AND STANDARDIZATION PURPOSE To determine the molarity of a NaOH solution by titrating it with a standard HCl solution. To determine the molarity of acetic acid in vinegar using

### CHEMICAL DETERMINATION OF EVERYDAY HOUSEHOLD CHEMICALS

CHEMICAL DETERMINATION OF EVERYDAY HOUSEHOLD CHEMICALS Purpose: It is important for chemists to be able to determine the composition of unknown chemicals. This can often be done by way of chemical tests.

### Properties of Hydrates Prelab. 3. Give the chemical formula for copper(ii) nitrate pentahydrate.

Properties of Hydrates Prelab Name Total /10 SHOW ALL WORK NO WORK = NO CREDIT 1. What is the purpose of this experiment?. What is the definition of a hydrate? 3. Give the chemical formula for copper(ii)

### FAJANS DETERMINATION OF CHLORIDE

EXPERIMENT 3 FAJANS DETERMINATION OF CHLORIDE Silver chloride is very insoluble in water. Addition of AgNO 3 to a solution containing chloride ions results in formation of a finely divided white precipitate

### SUPPLEMENTARY MATERIAL

SUPPLEMENTARY MATERIAL (Student Instructions) Determination of the Formula of a Hydrate A Greener Approach Objectives To experimentally determine the formula of a hydrate salt. To learn to think in terms

### General Chemistry II Chapter 20

1 General Chemistry II Chapter 0 Ionic Equilibria: Principle There are many compounds that appear to be insoluble in aqueous solution (nonelectrolytes). That is, when we add a certain compound to water

### 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,

### 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

### ISOLATION OF CAFFEINE FROM TEA

ISLATIN F CAFFEINE FRM TEA Introduction In this experiment, caffeine is isolated from tealeaves. The chief problem with the isolation is that caffeine does not exist alone in the tealeaves, but other natural

### 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

### Chapter 16: Tests for ions and gases

The position of hydrogen in the reactivity series Hydrogen, although not a metal, is included in the reactivity series because it, like metals, can be displaced from aqueous solution, only this time the

### 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

### Electrochemistry Revised 04/29/15

INTRODUCTION TO ELECTROCHEMISTRY: CURRENT, VOLTAGE, BATTERIES, & THE NERNST EQUATION Experiment partially adapted from J. Chem. Educ., 2008, 85 (8), p 1116 Introduction Electrochemical cell In this experiment,

### Total Water Hardness

Test 14 INTRODUCTION When water passes through or over deposits such as limestone, the levels of Ca 2+, Mg 2+, and HCO Ð 3 ions present in the water can greatly increase and Hard-Water Cations cause the

### 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

### Experiment 9 Electrochemistry I Galvanic Cell

9-1 Experiment 9 Electrochemistry I Galvanic Cell Introduction: Chemical reactions involving the transfer of electrons from one reactant to another are called oxidation-reduction reactions or redox reactions.

### The most common active ingredient used in deodorants is aluminium chlorohydrate. But not all deodorants contain aluminium chlorohydrate:

Engineeringfragrance make a deodorant practical activity 2 student instructions page 1 of 5 chemical compounds The most common active ingredient used in deodorants is aluminium chlorohydrate. But not all