CAIE A Level Chemistry 9701 · Electrochemistry
Concentrated aqueous sodium chloride is electrolysed using inert electrodes.
Suggest the identity of the substances liberated at each electrode, and explain your reasoning in terms of the ions present and their relative ease of discharge.
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
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