Question

LAQ : Mention the composition of electrolyte and electrode reactions of extraction of aluminium

  • Electrolysis
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Answer

Question

Mention the composition of electrolyte and electrode reactions of extraction of aluminium.

Answer

Composition of electrolytes: Mixture of 60% cryolite (AIF3, 3NaF), 20% alumina (Al2O3), and 20% fluorospar (CaF2).

Cathode reaction:

2Al3+ + 6e → 2Al (Reduction)

Anode reaction:

302- – 6e → (3/2)O2 (oxidation)

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