Chemical Test for Chlorine

Specification Point 6.8:
  • Describe the chemical test for chlorine.
  • Chlorine is a pale green gas and has a choking, pungent smell.
  • The test for chlorine involves holding damp litmus paper close to the gas source and observing the colour change.
  • If chlorine is present the paper will be turned white due to the bleaching effect of chlorine.
  • Chlorine in solution has the same effect.
  • If blue litmus paper is used it may turn red first due to the acidic nature of chlorine solutions but will then turn white as soon as bleaching begins.
Chlorine Test, Edexcel GCSE Chemistry

Chlorine gas or chlorine in solution bleaches blue litmus paper white

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Edexcel GCSE Chemistry Notes

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Morgan Curtin Chemistry

Author: Morgan

Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.