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4.2 Electrolytic processes

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Question 24
H

An ion gains three electrons at the cathode. Which equation has the correct charge balance?

[1]
A

M3+→M+3e−\mathrm{M^{3+}\rightarrow M+3e^-}M3+→M+3e−

B

M3++3e−→M\mathrm{M^{3+}+3e^-\rightarrow M}M3++3e−→M

C

M3−+3e−→M\mathrm{M^{3-}+3e^-\rightarrow M}M3−+3e−→M

D

M+3e−→M3+\mathrm{M+3e^-\rightarrow M^{3+}}M+3e−→M3+

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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