Chemistry 5070 · O Level · Electrolysis

Electrolysis — practice question

This question concerns electrolysis.
(a)[3]

Complete Table 8.1 by giving the product names at each electrode.

(b)[2]

Electrolysing aqueous copper(II) sulfate gives different products when copper electrodes are used rather than graphite electrodes. Describe the observations seen during electrolysis with copper electrodes.

(c)[1]

Magnesium is made by the electrolysis of molten magnesium chloride. At the anode, chloride ions react to form chlorine molecules. Construct the ionic half-equation for this electrode reaction.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: KCl(aq): oxygen at the anode, hydrogen at the cathode

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