The electrolysis of some other solutions using inert electrodes
2 marks · EasyCalcium chloride solution is electrolysed using inert electrodes. Use the reactivity series to determine whether calcium or hydrogen is formed at the cathode. State your answer and give a reason.
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hydrogen
Common mistakes: calcium; chlorine
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Marking points
M1 · 1 mark · Uses reactivity series to compare calcium and hydrogen.
A1 · 1 mark · States hydrogen will be produced at the cathode.
Worked solution
Calcium is above hydrogen in the reactivity series, so hydrogen is formed at the cathode during electrolysis.