# Explain what happens at each electrode when molten sodium chloride is electrolysed using inert electrodes.

> Edexcel GCSE Chemistry (1CH0) — 3.2 Electrolytic processes · Explain · 4 marks

> Sodium chloride can be electrolysed in its molten state. Inert electrodes are used so that the electrodes do not react during the process.

## Mark scheme (4 marks)

1. Sodium ions (Na⁺) move towards the cathode (negative electrode)
2. At the cathode, sodium ions gain electrons (reduction) to form sodium metal
3. Chloride ions (Cl⁻) move towards the anode (positive electrode)
4. At the anode, chloride ions lose electrons (oxidation) to form chlorine gas

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