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4.2 Electrolytic processes

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Question 19
H

Which pair of half equations describes copper transfer in purification?

[1]
A

Anode: Cu→Cu2++2e−\mathrm{Cu\rightarrow Cu^{2+}+2e^-}Cu→Cu2++2e−; cathode: Cu2++2e−→Cu\mathrm{Cu^{2+}+2e^-\rightarrow Cu}Cu2++2e−→Cu

B

Anode: Cu2++2e−→Cu\mathrm{Cu^{2+}+2e^-\rightarrow Cu}Cu2++2e−→Cu; cathode: Cu→Cu2++2e−\mathrm{Cu\rightarrow Cu^{2+}+2e^-}Cu→Cu2++2e−

C

Both electrodes: Cu→Cu++e−\mathrm{Cu\rightarrow Cu^++e^-}Cu→Cu++e−

D

Anode: 2Cl−→Cl2+2e−\mathrm{2Cl^-\rightarrow Cl_2+2e^-}2Cl−→Cl2​+2e−; cathode: H++e−→H\mathrm{H^++e^-\rightarrow H}H++e−→H

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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