During the Hall-Heroult process of preparing Al metal from purified bauxite, if 3 moles of O 2 is formed at anode the number of moles of Al formed at cathode is

Question

During the Hall-Heroult process of preparing Al metal from purified bauxite, if 3 moles of O 2 is formed at anode the number of moles of Al formed at cathode is (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

6 O 2- longrightarrow 3 O 2+12 e- and 4 Al 3++12 e- longrightarrow 4 Al. This shows that for every 3 moles of oxygen 4 moles Al is formed.

Q. During the Hall-Heroult process of preparing $A l$ metal from purified bauxite, if $3$ moles of $O_{2}$ is formed at anode the number of moles of $A l$ formed at cathode is

$6 O^{2 -} ⟶ 3 O_{2} + 12 e^{-}$

and $4 A l^{3 +} + 12 e^{-} ⟶ 4 A l$ .

This shows that for every $3$ moles of oxygen $4$ moles $A l$ is formed.

Q. During the Hall-Heroult process of preparing Al metal from purified bauxite, if 3 moles of O2​ is formed at anode the number of moles of Al formed at cathode is

6O2−⟶3O2​+12e− and 4Al3++12e−⟶4Al. This shows that for every 3 moles of oxygen 4 moles Al is formed.

Q. During the Hall-Heroult process of preparing $A l$ metal from purified bauxite, if $3$ moles of $O_{2}$ is formed at anode the number of moles of $A l$ formed at cathode is

$6 O^{2 -} ⟶ 3 O_{2} + 12 e^{-}$

and $4 A l^{3 +} + 12 e^{-} ⟶ 4 A l$ .

This shows that for every $3$ moles of oxygen $4$ moles $A l$ is formed.