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4.3 Electrolysis

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Question 2
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A student uses inert electrodes to electrolyse separate samples of aqueous magnesium sulfate, calcium nitrate, potassium chloride and lithium bromide.

Which pair of solutions produces oxygen at both positive electrodes?

[1]
A

Magnesium sulfate and calcium nitrate solutions

B

Calcium nitrate and lithium bromide solutions

C

Magnesium sulfate and potassium chloride solutions

D

Potassium chloride and lithium bromide solutions

Markscheme

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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