Tests for Gases
This lesson covers:
- How to test for the gases chlorine, oxygen, hydrogen, and carbon dioxide
How do you test for chlorine gas?
Expose it to a glowing splint
Bubble it though limewater
Expose it to damp blue litmus paper
Expose it to a lit splint
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What happens when damp blue litmus paper is exposed to chlorine gas?
The damp litmus paper lights on fire
The damp litmus paper turns red, then bleaches white
The damp litmus paper turns green
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What safety precautions are required for testing chlorine gas?
(Select all that apply)
Do the experiment in a fume cupboard
Wear a gas mask
Do not have any paper nearby
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How do you test for oxygen gas?
Expose it to a lit splint
Expose it to a glowing splint
Expose it to damp blue litmus paper
Bubble it though limewater
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What happens when a glowing splint is exposed to oxygen gas?
It will give a squeaky pop sound
The glowing splint will relight
The flame will be extinguished
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How do you test for hydrogen gas?
Bubble it though limewater
Expose it to a lit splint
Expose it to a glowing splint
Expose it to damp blue litmus paper
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What happens when hydrogen gas is exposed to a lit splint?
The flame will burn green
The flame fizzles out
There is a squeaky pop sound
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How do you test for carbon dioxide gas?
Bubble it through limewater
Expose it to a burning splint
Expose it to damp blue litmus paper
Expose it to a glowing splint
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What happens when you bubble carbon dioxide gas through limewater?
The limewater turns blue
The limewater turns cloudy
Solid crystals form
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