Question

write the reactions involved in the extraction of aluminium from bauxite

Answer 1

Aluminium ore is called bauxite. The bauxite is purified to yield a white powder,aluminium oxide, from which aluminium can be extracted. The extraction is done by electrolysis. But first the aluminium oxide must be made molten so that electricity can pass through it.

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Answer 2

Al2O3 + 2NaOH -------> 2NaAlO2 + H2O
NaAlO2 + 2H2O -------> NaOH + Al(OH)3