Chlorine (Oxford AQA IGCSE Chemistry)
Revision Note
Written by: Alexandra Brennan
Reviewed by: Stewart Hird
Test for Chlorine Gas
The test for chlorine makes use of litmus paper
If chlorine gas is present, damp blue litmus paper will turn red and then be bleached white
It turns red initially as acids are produced when chlorine comes into contact with water
Chlorine also has a characteristic sharp, choking smell
Chlorine should always be handled in a fume cupboard due to its toxicity
Testing for chlorine gas
Examiner Tips and Tricks
You should distinguish between properties of gases and tests for gases. Chlorine 'smells like swimming pools' is a characteristic, but it is not an acceptable means of identification.
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