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4.3 Electrolysis

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Question 13

A student electrolyses aqueous potassium sulfate using inert electrodes. The volume of gas collected at the positive electrode is 15 cm3.

What volume of gas is collected at the negative electrode?

[1]
A

7.5 cm37.5\,\text{cm}^37.5cm3

B

45 cm345\,\text{cm}^345cm3

C

30 cm330\,\text{cm}^330cm3

D

15 cm315\,\text{cm}^315cm3

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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