Question

Why is electrolysis carried out in aluminium oxide solution

Answer 1

Answer:

The mixture of cryolite and aluminium oxide has a lower melting point than pure aluminium oxide. ... Molten cryolite serves as a solvent for the molten aluminium oxide and increases the conductivity of the solution

The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it. Aluminium oxide has a very high melting point (over 2000°C) so it would be expensive to melt it. ... oxide ions lose electrons at the anode, and form oxygen molecules.

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