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3.4 Electrolysis

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Question 30

A metalworker uses electrolysis to add copper to a pure copper roof finial. The finial is the cathode and a pure copper plate is the anode in copper(II) sulfate solution.

The anode has a mass of 28.64 g before electrolysis and 28.11 g afterwards. The finial has a mass of 16.84 g after electrolysis.

What was the mass of the finial before electrolysis?

[1]
A

17.37 g

B

15.78 g

C

16.31 g

D

16.84 g

Markscheme

3.4 Electrolysis Questions

  1. GCSE
  2. /Chemistry
  3. /3.4 Electrolysis

98 exam-style questions on OCR GCSE Chemistry 3.4 Electrolysis, covering 3.4.1 Products formed at the electrodes in electrolysis and 3.4.2 The technique of electrolysis. Each one has a worked solution and a mark scheme showing where the marks go.

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