Question

how much electricity in terms of COULOMB IS REQUIRED to produce 40g of Aluminium from molten Al2O3​

Answer 1

4.4F

Explanation:

1 mole (40 g) of Ca will require 2 F of electricity.

20 g (0.5 mole) of Ca will require 1 F of electricity.

(2) Al

3+

+3e

−

→Al

1 mole (27 g) of Al will require 3 moles of electrons.

40 g of Al will require

27

3×40F

=4.4 F