Question

Balance the following equation by ion electrode method.

Cl2O4 (g)+H2O2 (aq)->ClO2-(aq )+O2 (g)+ H+

Answer 1

Answer : The balanced equation is,

$Cl_2O_4+H_2O_2+2H^+\rightarrow 2ClO_2^-+O_2+2H_2O$

Explanation :

In the ion electron method, the number of atoms in each half reaction and number of electrons must be balanced.

The half reactions in the acidic medium are :

Reduction : $Cl_2O_4+4H^++2e^-\rightarrow 2ClO_2^-+2H_2O$   ......(1)

Oxidation : $H_2O_2\rightarrow O_2+2H^++2e^-$      .......(2)

Now adding both the equations, we get the balanced redox reaction.

Thus, the balanced redox reaction will be,

$Cl_2O_4+H_2O_2+2H^+\rightarrow 2ClO_2^-+O_2+2H_2O$