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Question
Indicate the principle behind the method used for the refining of zinc.
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Solution
Zinc is refined using electrolytic refining process. In this process, pure zinc is transported to cathode from the impure sample at anode. The more basic metal remains in the electrolytic solution and the less basic metals, present as impurities, precipitate as anode mud.
| Electrode | Chemical Reaction |
| Anode | Zn → Zn2+ + 2e- (From anode) |
| Cathode | Zn2+ + 2e- → Zn (From electrolyte) |
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