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Electrolytic Refining

When alumina ...

Question

When alumina is subjected to electrolytic reduction, fluorspar and cryolite are added to the electrolyte. What purpose do they serve?

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Solution

When alumina is subjected to electrolytic reduction, fluorspar and cryolite are added to the electrolyte because fluorspar and cryolite lowers the melting point of alumina.

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