Gases

Identification of Gases Hands-On Labs, Inc. Version 42-0189-00-02

Review the safety materials and wear goggles when working with chemicals. Read the entire exercise before you begin. Take time to organize the materials you will need and set aside a safe work space in which to complete the exercise.

Experiment Summary:

You will learn the properties of gases. You will investigate a series of chemical reactions that generate different gases with unique properties. You will generate a series of gases and explore the properties of gases through flame tests and chemical reactions. You will also use your results to identify an “unknown” gas.

EXPERIMENT

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Learning Objectives Upon completion of this laboratory, you will be able to:

● Define solids, liquids, and gases.

● Identify the unique properties of gases.

● Explain how gases are identified.

● Describe a gas generation tube and how it is used to isolate gases.

● Perform flame and chemical tests on isolated gases from controlled experiments.

● Categorize gases produced in experimental reactions.

● Analyze experimental results to identify unknown gases.

Time Allocation: 3 hours

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Experiment Identification of Gases

Materials Student Supplied Materials

Quantity Item Description 1 Aluminum pie pan 1 Baking soda, 1 tablespoon 1 Box of matches 1 Coffee cup 1 Dish soap 1 Hydrogen peroxide, 3% 20 mL 1 Metal spoon 1 Pair of scissors, 4 in 1 Roll of paper towels 1 Sheet of white paper 1 Source of tap water 4 Toothpicks 1 White vinegar, 20 mL

HOL Supplied Materials

Quantity Item Description 1 Drinking straw 1 Gas assembly, copper and plastic tubing in rubber stopper 1 Gas assembly, plastic tube in rubber stopper 2 Pairs of gloves 1 Pair of safety goggles 1 Permanent marker 4 Test tubes, 13 x 100 mm 1 Test tube cleaning brush 3 Short, thin-stem pipets 1 Well plate – 24 1 Experiment Bag: Identification of Gases (or Properties of Gases)

2 – Antacid tablets in bag 2”x 3” 1 – Bromothymol blue- 4 mL in Pipet 1 – Calcium hydroxide, 6 mL in dropper bottle 1 – Hydrochloric acid, 2.0 M, 20 mL in dropper bottle 3 – Pipet bulb, wide-neck with 1/4” stem 1 – Manganese, 4-6 pieces in bag 2” x 3” 1 – Mossy zinc, 4-6 pieces in bag 2” x 3”

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Experiment Identification of Gases

Note: To fully and accurately complete all lab exercises, you will need access to:

1. A computer to upload digital camera images.

2. Basic photo editing software, such as Microsoft Word® or PowerPoint®, to add labels, leader lines, or text to digital photos.

3. Subject-specific textbook or appropriate reference resources from lecture content or other suggested resources.

Note: The packaging and/or materials in this LabPaq kit may differ slightly from that which is listed above. For an exact listing of materials, refer to the Contents List included in your LabPaq kit.

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