The diagram shows how an experiment was set up to investigate the electrolysis of aqueous nickel(II) sulphate using carbon electrodes. Oxygen is collected above one electrode.

1. aDescribe the direction of movement of the electrons in the external circuit. [1]
2. bWhat is meant by the term electrolysis? [1]
3. cName, or give the formula of, the ion that is discharged at the anode. [1]
4. dWrite the ionic equation for the reaction at the cathode. [1]
5. eState two changes to the set-up so that it can be used to electroplate a spoon with nickel. [2]

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