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4.2 Electrolytic processes

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Question 17
H

Which half equation represents bromide ions forming bromine?

[1]
A

Br2+2e−→2Br−\mathrm{Br_2+2e^-\rightarrow 2Br^-}Br2​+2e−→2Br−

B

Br−+e−→Br\mathrm{Br^-+e^-\rightarrow Br}Br−+e−→Br

C

Br2→2Br++2e−\mathrm{Br_2\rightarrow 2Br^++2e^-}Br2​→2Br++2e−

D

2Br−→Br2+2e−\mathrm{2Br^-\rightarrow Br_2+2e^-}2Br−→Br2​+2e−

Markscheme

4.2 Electrolytic processes Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Electrolytic processes

52 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.

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