1. Electrolysis Question
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Higher Tier
Walking Talking Mark
GCSE Chemistry (Legacy Specification)
Electrolysis Question
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2. QWC: Zinc is produced by the electrolysis of molten zinc chloride.
Question – Electrolysis
QWC: Zinc is produced by the electrolysis of molten zinc chloride.
Explain how this process works and the products that are formed.
(8 marks)

3. Answer – Electrolysis
As electricity passes through the molten zinc chloride zinc ions are formed, they are positive (cations) so they move to negative electrode (cathode). Here the ion gains electrons and is reduced to become zinc atoms (zinc metal). The chloride ions are formed when electricity passes through the molten zinc chloride they form negative (anions) and move to positive electrode (anode). Here they lose electrons, become oxidised and form diatomic chlorine atoms (chlorine gas). This is a redox reaction as zinc ions are reduced and chloride ions are oxidised.