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4.2 Electrolytic processes

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Question 10
H

Sodium sulfate solution is electrolysed using inert electrodes.

96 cm3\mathrm{cm^{3}}cm3 of hydrogen is collected at the cathode, measured at room temperature and pressure. One mole of any gas occupies 24 000 cm3\mathrm{cm^{3}}cm3 at room temperature and pressure.

Relative formula mass: H2O\mathrm{H_{2}O}H2​O = 18

Which row gives the volume of gas formed at the anode and the mass of water decomposed?

[1]
A

96 cm3\mathrm{cm^{3}}cm3 and 0.072 g

B

48 cm3\mathrm{cm^{3}}cm3 and 0.036 g

C

96 cm3\mathrm{cm^{3}}cm3 and 0.144 g

D

48 cm3\mathrm{cm^{3}}cm3 and 0.072 g

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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