Properties of Gases

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Purpose:
The purpose of this experiment was to test and observe the physical and chemical properties of gases, and to use these properties to identify these gases when they are encountered.

Procedure:

Create a data table similar to that in the lab assistant to record your observations.

Gather the following lab equipment: Goggles, test tubes, 24 well plate, Gas assembly with copper and plastic tubing and a #00 stopper, short stem pipet, rubber stopper #00 with one hole and a pipet tip with plastic gas delivery tube, 2 small tables of AlkaSeltzer, 4mL Bromothymol blue .04%, 20 mL hydrochloric acid, 4-6 pieces of manganese metal, 4-6 pieces of mossy zinc, and 3 pipet bulbs.

Gather the following items: Matches, toothpicks, pie tin, white vinegar, 3% hydrogen peroxide, measuring spoons, drinking straw, tissue paper, and baking soda.

Read all instructions carefully before beginning your experiment.

1. Hydrogen a. Take a small piece of Mossy Zinc from the experiment bag and place it into a test tube containing diluted HCl. b. Take the rubber stopper with the pipet hole and gas tubing in the top and cap the test tube tightly. Take some tissue paper, a couple mm thick, and use it to help level your test tube in the well plate. Watch what happens. c. Fill one of the wide-neck pipe bulbs with water to the top. Hold it next to the test tube containing the Zn, and quickly invert it over the top of the gas delivery tube. d. The water might overflow when the gas displaces it, so place the well plate inside of the pie tin. e. When the water in the pipet bulb has been completely displaced by the hydrogen gas, remove the pipet, being sure to keep it inverted, and place your thumb over the opening to keep any from escaping. f. Light a match, and while holding the hydrogen pipet bulb horizontal and about 1cm from the flame, gently squeeze a small amount of gas towards the flame and watch the reaction. g. Record

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