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Indicate the Principle Behind the Method Used for the Refining of Zinc. - CBSE (Science) Class 12 - Chemistry

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Question

Indicate the principle behind the method used for the refining of zinc.

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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Solution Indicate the Principle Behind the Method Used for the Refining of Zinc. Concept: Occurrence of Metals.
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