• Introductory Chemistry Online

This newest version of laboratory activities has evolved from Charles H. Corwin's experiments, which have been used by nearly 200,000 students. In addition to the fresh new art program that enhances student orientation to each experiment, this version retains the highly successful format of prelaboratory preparation, stepwise guided procedures, and postlaboratory assignmen This newest version of laboratory activities has evolved from Charles H. Corwin's experiments, which have been used by nearly 200,000 students. In addition to the fresh new art program that enhances student orientation to each experiment, this version retains the highly successful format of prelaboratory preparation, stepwise guided procedures, and postlaboratory assignments. The laboratory manual is especially well suited for students in Introductory Chemistry, Preparatory Chemistry; and Allied Health Chemistry: In this newest version, the changes and improvements include: particular attention to the environmental issue. This version does not contain any procedures involving lead, mercury, chromium, chloroform, or carbon tetrachloride.

Experiments that utilize 13 X 100 mm test tubes, rather than 1.6 X 150 mm test tubes, so as to further reduce chemical waste. No special equipment is required and the labs are not microscale.

An increased effort to ensure the safety of students in the laboratory; operations that involve even minimal potential danger have been avoided. Students are alerted to procedures that should be performed carefully; and the prelaboratory assignments have questi.

Description Emphasizing environmental considerations, Corwin’s acclaimed lab manual offers a proven format of a prelaboratory assignment, a stepwise procedure, and a postlaboratory assignment. More than 300,000 students to date in Introductory Chemistry, Preparatory Chemistry, and Allied Health Chemistry have used these “bullet-proof” experiments successfully. The Sixth Edition features new environmental icons to alert students to recycle chemical waste, updated prelabs and postlabs, new experimental procedures, a new experiment (Experiment 25) and a new appendix on how to keep a laboratory notebook. Corwin’s lab manual can be packaged with any Pearson Intro Prep Chemistry book.

A set of objectives helps students focus on experimental activities. A list of equipment and chemicals organizes the experimental materials. Discussions include example exercises to show students how to perform the calculations associated with each quantitative procedure. Time-tested procedures and unknowns give good results, helping students build confidence and an appreciation for chemistry in the laboratory. Alerts to procedures that should be performed carefully and prelaboratory questions regarding safety are provided.

To ensure student safety, operations that present even minimal danger have been avoided. Environmentally “friendly” chemicals that do not contain lead, mercury, chromium, chloroform, or carbon tetrachloride are used. Line art illustrations demonstrate techniques for reading a metric ruler, graduated cylinder, thermometer, and buret; and instructions for using a laboratory burner, platform balance, beam balance, electronic balance, and volumetric pipet. Updated Prelaboratory Assignments that are detachable and can be submitted to the instructor before starting the experiment.

Postlaboratory Assignments are also detachable and can be submitted to the instructor after finishing the experiment. Environmental icons to alert students to recycle chemical waste appear throughout. I nstructor Demonstrations are provided for procedures that reduce chemical waste. Experimental Procedures are included that simplify tasks and provide a better workflow.

A new experiment, a comprehensive review of lab techniques as a practical final exam, has been added (Experiment 25). A laboratory notebook (Appendix H) has been added. Updated prelaboratory experiments to help students prepare for an experimen t have been added. Updated postlaboratory experiments to synthesize the principles in an experiment are now included.

Table of Contents SAFETY PRECAUTIONS LOCKER INVENTORY WASTE DISPOSAL EXPERIMENTS 1 Introduction to Chemistry Topic: The Scientific Method A. Instructor Demonstrations B. Student Experiments 2 Instrumental Measurements Topic: The Metric System A. Length Measurement B. Mass Measurement C. Mass and Volume of an unknown solid D.

Volume Measurements E. Temperature Measurements 3 Density of Liquids and Solids Topic: Density A. Instructor Demonstration B. Density of Water C.

Density of an Unknown Liquid D. Density of a Rubber Stopper E. Density of an Unknown Solid F. Thickness of Aluminum Foil 4 Freezing Points and Melting Points Topic: Change of Physical State A. Cooling Curve and Freezing Point B. Melting Point of an Unknown 5 Physical Properties and Chemical Properties Topic: Physical and Chemical Properties A.

Physical Properties B. Chemical Properties 6 “Atomic Fingerprints” Topic: Emission Spectra and Electron Energy Levels A.

Continuous Spectrum – White Light B. Line Spectrum – Hydrogen C. Line Spectra – Helium, Neon, Argon, Krypton, and Mercury D. Identifying Unknown Elements in a Fluorescent Light 7 Families of Elements Topic: The Periodic Table A. Analysis of Known Solutions B.

Analysis of an Unknown Solution 8 Identifying Cations in Solution Topic: Qualitative Cation Analysis A. Analysis of a Known Cation Solution B. Analysis of an Unknown Cation Solution 9 Identifying Anions in Solution Topic: Qualitative Anion Analysis A.

Analysis of a Known Anion Solution B. Analysis of an Unknown Anion Solution 10 Analysis of a Penny Topic: Writing and Balancing Chemical Equations A. Instructor Demonstrations-Combination Reactions B. Decomposition Reactions C.

Single-Replacement Reactions D. Double-Replacement Reactions E. Neutralization Reactions F. Percentages of Copper and Zinc in a Penny 11 Determination of Avogadro’s Number Topic: Avogadro’s Number and the Mole Concept A. Calibrating a Dropper Pipet B. Calculating Molecules in the Monolayer C.

Determining Avogadro’s Number 12 Empirical Formulas of Compounds Topic: Empirical Formula A. Empirical Formula of Magnesium Oxide B. Empirical Formula of Copper Sulfide 13 Analysis of Alum Topic: Percent Composition and Empirical Formula A. Percentage of Water in Alum Hydrate B.

Percentage of Water in an Unknown Hydrate C. Water of Crystallization in an Unknown Hydrate 14 Decomposing Baking Soda Topic: Mass–Mass Stoichiometry and Percent Yield A.

Percent Yield of Na2CO3 from Baking Soda B. Percentage of NaHCO3 in an Unknown Mixture 15 Precipitating Calcium Phosphate Topic: Mass–Mass Stoichiometry and Percent Yield A. Percent Yield of Ca3(PO4)2 from CaCl2 B. Percentage of CaCl2 in an Unknown Mixture 16 Generating Hydrogen Gas Topic: Mass–Volume Stoichiometry and Combined Gas Law A. Alfa spider shop manual. Molar Volume of Hydrogen Gas B. Atomic Mass of an Unknown Metal 17 Generating Oxygen Gas Topic: Mass–Volume Stoichiometry and Combined Gas Law A.

Percentage of KClO3 in a Known Mixture B. Percentage of KClO3 in an Unknown Mixture 18 Molecular Models and Chemical Bonds Topic: Chemical Bonding and Electron Dot Formulas A. Molecular Models with Single Bonds B. Molecular Models with Double Bonds C. Molecular Models with Triple Bonds D.

Molecular Models with Two Double Bonds E. Unknown Molecular Models 19 Analysis of Saltwater Topic: Solubility and Solution Concentration A. Solutes and Solvents B.

Rate of Dissolving C. Demonstration of Supersaturation D. Concentration of Sodium Chloride in Saltwater 20 Analysis of Vinegar Topic: Acid–Base Titrations A. Preparation of Standard Sodium Hydroxide Solution B. Concentration of Acetic Acid in Vinegar 21 Electrical Conductivity of Aqueous Solutions Topic: Net Ionic Equations A. Conductivity Testing—Evidence for Ions in Aqueous Solution B. Conductivity Testing—Evidence for a Chemical Reaction C.

Net Ionic Equations—A Study Assignment 22 Activity Series of Metals Topic: Oxidation–Reduction Reactions A. Oxidation Numbers of Manganese B. Oxidation Numbers of Chromium C. Oxidation Numbers of Sulfur D. Oxidation Numbers of Nitrogen E. Oxidation–Reduction Equations F. Activity Series and an Unknown Metal 23 Organic Models and Functional Groups Topic: Classes of Organic Compounds A.

Molecular Models of Hydrocarbons B. Molecular Models of Hydrocarbon Derivatives C.

Unknown Molecular Models 24 Separation of Food Colors and Amino Acids Topic: Separation of Biochemical Compounds A. Separation of Food Colors by Paper Chromatography B. Identification of Amino Acids by Paper Chromatography 25 Laboratory Instruments and Technique Topic: Lab Final Exam A. Lab Practical Exam B. Lab Written ExamAPPENDICES A Laboratory Burner B Decigram Balance C CentigramBalance D Milligram Balance E Volumetric Pipet F Activity Series for Metals G Solubility Rules H Laboratory Notebook I Glossary J Answers to Prelaboratory Assignments. About the Author(s) Charles H. Corwin has spent over 30 years teaching chemistry to over 10,000 students.

Introductory Chemistry Online

He has taught general chemistry, organic chemistry, and quantitative analysis, but has focused primarily on introductory chemistry for the personal rewards it offers. Corwin took his degrees at San Jose State University, where he was a member of Tau Delta Phi honor society. Early in his career, he was awarded a National Science Foundation grant to study instructional innovations at Grand Valley State University. Currently, he is a professor of chemistry at American River College, where he was recognized as Teacher of the Year in 1994. He is also the recipient of an Alumni Teaching award from Purdue University.