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Electrolysis

Electrolysis

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Question 13

Molten lead(II) bromide can be electrolysed.

What is the correct half-equation for the reaction at the negative electrode (cathode)?

A

2Br−−2e−→Br22\text{Br}^- - 2\text{e}^- \rightarrow \text{Br}_22Br−−2e−→Br2​

B

Pb2++2e−→Pb\text{Pb}^{2+} + 2\text{e}^- \rightarrow \text{Pb}Pb2++2e−→Pb

C

Pb2++e−→Pb\text{Pb}^{2+} + \text{e}^- \rightarrow \text{Pb}Pb2++e−→Pb

D

Pb2+−2e−→Pb\text{Pb}^{2+} - 2\text{e}^- \rightarrow \text{Pb}Pb2+−2e−→Pb

Markscheme

Electrolysis Questions

  1. GCSE
  2. /Chemistry
  3. /Electrolysis

34 exam-style questions on OCR GCSE Chemistry Electrolysis. Each one has a worked solution and a mark scheme showing where the marks go.

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