How much electricity is required in coulomb for the oxidation of (i) 1 mol of H2O to O2. (ii) 1 mol of FeO to Fe2O3

Q.14: How much electricity is required in coulomb for the oxidation of

(i) 1 mol of H2O to O2.                     

(ii) 1 mol of FeO to Fe2O3.

Solution:

(i)        We have 1 mol of H₂O

1 mol of H₂O  will give one atom of O 

Charge on O = – 2

Electricity required         =n F

= 2 × 96487 Coulombs

= 192974 Coulombs

= 1.93 × 10⁵ Coulombs

(ii)                      

Charge on Fe in compound FeO        = + 2

Charge on Fe in compound Fe₂O₃ = + 3

Change in charge  n = 1

Electricity required          = nF

 = 96487 Coulombs

 = 9.65 × 10⁴ Coulombs