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Molten zinc chloride is an electrolyte - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Question 6
Molten zinc chloride is an electrolyte. (i) Which row shows the products formed at the anode and at the cathode when molten zinc chloride is electrolysed?
Worked Solution & Example Answer:Molten zinc chloride is an electrolyte - Edexcel - GCSE Chemistry - Question 6 - 2018 - Paper 1
Step 1
Which row shows the products formed at the anode and at the cathode when molten zinc chloride is electrolysed?
Answer
When molten zinc chloride (ZnCl₂) is electrolysed, the process involves the movement of ions. At the anode, chloride ions (Cl⁻) are oxidized to form chlorine gas (Cl₂), while at the cathode, zinc ions (Zn²⁺) are reduced to form zinc metal (Zn). Therefore, the correct row that shows the products formed is:
- Product at anode: chlorine gas (Cl₂)
- Product at cathode: zinc (Zn)
This corresponds to option C in the table.