Vernier Software and Technology
Vernier Software & Technology

Investigating the Purity of a Mixture


Determining the purity of mixture can offer a chemist a number of options. Choosing the best process among the possibilities often involves considering factors such as complexity of the process, safety and handling, cost, and disposal of waste. In this investigation, you will practice various methods of testing a mixture. A major consideration in the testing, analysis, evaluation, and recommendation will be the principles of the laboratory concept known as Green Chemistry.

What is Green Chemistry? The U.S. Environmental Protection Agency (EPA) describes the mission of Green Chemistry as the design of chemical processes and products in a way that reduces and/or eliminates the production of substances that are hazardous to humans, animals, and the environment.


The objective of this investigation is to determine the amount of each substance in the mixture. There are many ways to accomplish this objective, three of which will be presented in the Initial Investigation.

In addition, you will evaluate the three methods of testing, with regard to accuracy, ease of operation, and the principles of Green Chemistry in order to recommend one method.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Vernier Chemistry Investigations for Use with AP* Chemistry

See other experiments from the lab book.

1Investigating Food Dyes in Sports Beverages
2Determining the Copper Content in Brass
3Investigating Water Hardness
4The Acidity of Juice and Soft Drinks
5Separating Molecules
6Identifying an Unknown Substance
7Investigating the Purity of a Mixture
8Determining the Percent Peroxide in a Commercial Product
9Investigating the Components of a Commercial Tablet
10The Effect of Acid Rain on a Marble Structure
11Investigating the Kinetics of a Crystal Violet Reaction
12Investigating Commercial Hand Warmers
13Investigating LeChatelier’s Principle
14Investigating Acid-Base Titrations
15The Buffering Ability of Commercial Products
16Testing the Effectiveness of a Buffer

Experiment 7 from Vernier Chemistry Investigations for Use with AP* Chemistry Lab Book

<i>Vernier Chemistry Investigations for Use with AP* Chemistry</i> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

Buy the Book

Dev Reference: VST0704

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