A-LevelChemistryElectrochemistry9701/12 · May/June 2015 · Q71 Mark

In industry, copper metal is purified by electrolysis. Which changes occur to the masses of the electrodes and to the colour of the electrolyte during this process? mass of anode mass of cathode colour of electrolyte

Adecrease, increase, little or no change occurs

Bdecrease, increase, pale blue to blue

Cincrease, decrease, little or no change occurs

Dincrease, decrease, blue to pale blue

✓ Correct answer

A: decrease, increase, little or no change occurs

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 7.

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