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Group 7 (halogens) – chlorine, bromine and iodine

Group 7 (halogens) – chlorine, bromine and iodine

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Question 4

A laboratory technician is preparing a demonstration to illustrate the relative oxidising abilities of chlorine, bromine, and iodine.

The technician has access to the following aqueous solutions:

  • Chlorine water
  • Bromine water
  • Iodine water
  • Potassium chloride solution
  • Potassium bromide solution
  • Potassium iodide solution

Describe two distinct displacement experiments the technician could perform to demonstrate the trend in reactivity of these three halogens.

Your answer should include:

  • the two specific solutions mixed in each experiment
  • the expected observations, including the initial and final appearance of the mixtures
  • a balanced ionic equation, including state symbols, for one of the reactions
[5]
Markscheme

Group 7 (halogens) – chlorine, bromine and iodine Questions

  1. IGCSE
  2. /Chemistry
  3. /Group 7 (halogens) – chlorine, bromine and iodine

33 exam-style questions on Edexcel IGCSE Chemistry Group 7 (halogens) – chlorine, bromine and iodine. Each one has a worked solution and a mark scheme showing where the marks go.

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