Chemistry
Distinguish between electrolytic methods of reduction and refining.
Metallurgy
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Answer
| Electrolytic reduction | Electrolytic refining |
|---|---|
| Metals higher in the activity series like potassium and sodium cannot be reduced by common reducing agents like CO or C, hence, these metals are obtained by electrolytic reduction of fused metallic salts. | It is the method by which crude metal is purified. |
| Cathode is usually made of iron and anode of graphite. | Impure metal is made the anode while pure metal is the cathode. |
| It precedes electrolytic refining. | It is done after electrolytic reduction. |
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