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7.2 Group 7

7.2 Group 7

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Question 15

An analyst is presented with three unlabelled bottles containing aqueous solutions of different sodium halides: sodium chloride, sodium bromide, and sodium iodide. They are also given three unlabelled bottles containing aqueous solutions of different halogens: chlorine, bromine, and iodine.

Describe a systematic procedure the analyst could carry out to identify the contents of each of the six bottles. In your answer, you should:

  • Describe the experimental method.
  • Detail the observations that would be made.
  • Explain how these observations allow the identification of each solution.
  • Deduce the order of reactivity of the halogens from these results, explaining the chemistry involved.
  • Write ionic equations for the reactions that occur.
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Markscheme

7.2 Group 7 Questions

  1. GCSE
  2. /Chemistry
  3. /7.2 Group 7

106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.

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