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4.2 Electrolytic processes

4.2 Electrolytic processes

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Question 27

During electroplating, copper metal is deposited onto a steel key. Which half-equation represents this reaction?

A

Cu→Cu2++2e−\text{Cu} \rightarrow \text{Cu}^{2+} + 2\text{e}^-Cu→Cu2++2e−

B

Cu2++2e−→Cu\text{Cu}^{2+} + 2\text{e}^- \rightarrow \text{Cu}Cu2++2e−→Cu

C

Cu2+→Cu+2e−\text{Cu}^{2+} \rightarrow \text{Cu} + 2\text{e}^-Cu2+→Cu+2e−

D

Cu+2e−→Cu2+\text{Cu} + 2\text{e}^- \rightarrow \text{Cu}^{2+}Cu+2e−→Cu2+

Markscheme

4.2 Electrolytic processes Questions

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

83 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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