Question

why use cryolite in electrolytes use in pure alumina

Answer 1

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Give two reasons why cryolite is used in the electrolysis of aluminium oxide. The mixture of cryolite and aluminium oxide has a lower melting point than pure aluminiumoxide. ... Molten cryolite serves as a solvent for the molten aluminium oxide and increases the conductivity of the solution.

Answer 2

cryolite is an aluminum compound with a much lower melting point than aluminium oxide and so using this reduces some of the coasts in extracting aluminium. the steel case in coated with graphite, providing the negative cathode.