Chemistry, asked by rukmenisawakhande, 4 months ago

1. State any one difficulty faced during electrolytic reduction of Al2O3 electrolyte?

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Answered by FOXPOWER

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The electrolysis of pure alumina faces some difficulties. Pure alumina is a bad conductor of electricity. The fusion temperature of pure alumina is about 2000∘C and at this temperature when electrolysis is carried out on the fused mass, the metal formed vaporizes, as the boiling point of aluminium is 1800∘C. These difficulties are overcome by using a mixture containing alumina, cryolite (Na3.AlF6), and fluorspar (CaF2) which forms a melt with lower melting temperature.

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