Chemistry·Qualitative analysis · NSSCO 8.2
Identifying gases
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A gas fizzes off in a reaction — but which one is it? Learn the five standard NIED gas tests: limewater for carbon dioxide, a lighted splint for hydrogen, a glowing splint for oxygen, damp litmus for ammonia and chlorine — the tests that finish off qualitative analysis.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 8.2):
- Describe the test and positive result for carbon dioxide (limewater)
- Describe the test and positive result for hydrogen (lighted splint)
- Describe the test and positive result for oxygen (glowing splint)
- Describe the test and positive result for ammonia (damp red litmus)
- Describe the test and positive result for chlorine (bleaches damp litmus)
- Draw conclusions from gas-test results
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Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.
Hands-on lab
Flame & gas tests — interactive 3D lab