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4.2 Electrolytic processes

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Question 18
H

During electrolysis of acidified water, the volume of hydrogen collected is approximately twice the volume of oxygen. Which equation explains this?

[1]
A

H2O→H2+O2\mathrm{H_2O\rightarrow H_2+O_2}H2​O→H2​+O2​

B

2H2+O2→2H2O\mathrm{2H_2+O_2\rightarrow 2H_2O}2H2​+O2​→2H2​O

C

H2O→2H+O\mathrm{H_2O\rightarrow 2H+O}H2​O→2H+O

D

2H2O→2H2+O2\mathrm{2H_2O\rightarrow 2H_2+O_2}2H2​O→2H2​+O2​

Markscheme

4.2 Electrolytic processes Questions

  1. GCSE
  2. /Chemistry
  3. /4.2 Electrolytic processes

52 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.

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