Question

Balance the following redox reaction by half reaction method :

H2O2 (aq) +Fe2+(aq) -> Fe3+ (aq) + H2 O(l) (acidic medium) ​

Answer 1

Answer:

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Explanation:

The oxidation half reaction is Fe

2+

(aq)→Fe

3+

(aq)+e

−

.

The reduction half reaction is H

2

O

2

(aq)+2H

+

(aq)+2e

−

→2H

2

O(l).

In the above half-reactions, all the atoms are balanced.

The oxidation half-reaction is multiplied by 2 so as to balance the number of electrons in oxidation half-reaction with reduction half-reaction.

2Fe

2+

(aq)→2Fe

3+

(aq)+2e

−

.

The oxidation half-reaction is then added to the reduction half-reaction to obtain a balanced chemical equation.

H

2

O

2

(aq)+2Fe

2+

(aq)+2H

+

→2Fe

3+

(aq)+2H

2

O(l)