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In this lesson, we will learn how to use qualitative chemical tests to identify common gases, including hydrogen, oxygen, carbon dioxide, and chlorine.
Q1:
A student uses a test tube to collect the gas produced by a chemical reaction. After lighting a splint, they blow out the flame and then insert the splint into the test tube. It reignites and glows brightly.
What is the probable identity of the gas?
Why does the splint glow more brightly than it did when burning in air?
Which of the following reactions could have produced the gas?
Q2:
A student uses a test tube to collect the gas produced by a chemical reaction. When a lit splint is placed at the opening of the test tube, there is a brief flash and a loud popping sound. In addition, fine droplets of colorless liquid are formed on the inside of the tube.
What is the probable identity of the colorless liquid?
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