State the electrode reaction at the respective electrodes during extraction of Al from Al2O3.

Reaction:

Al₂O₃ ⇌ 2Al³⁺ + 3O^2-

Reaction at cathode:

2Al³⁺ + 6e^– ⟶ 2Al

Reaction at anode:

3O^2- – 6e^– ⟶ 3[O]

3[O] + 3[O] ⟶ 3O₂