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4.3 Electrolysis

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Question 9

Copper(II) sulfate solution is electrolysed using inert electrodes. A pink-brown coating forms on the negative electrode and no gas is given off there.

Which statement explains this observation at the negative electrode?

[1]
A

Copper is below hydrogen in the reactivity series, so copper ions are discharged

B

The solution contains no hydrogen ions, so only copper ions can be discharged

C

Copper is above hydrogen in the reactivity series, so copper ions are discharged

D

Hydrogen ions move to the positive electrode, so only copper ions are discharged

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4.3 Electrolysis Questions

  1. GCSE
  2. /Chemistry
  3. /4.3 Electrolysis

76 exam-style questions on AQA GCSE Chemistry 4.3 Electrolysis, covering 4.3.1a The process of electrolysis, 4.3.1b Half equations in electrolysis, 4.3.2 Electrolysis of molten ionic compounds, 4.3.3 Using electrolysis to extract metals, 4.3.4 Electrolysis of aqueous solutions, and 4.3.5 Representation of reactions at electrodes as half equations. Each one has a worked solution and a mark scheme showing where the marks go.

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