Consider the following two balanced half-reactions occurring in acidic solution

CHEMISTRY · Single correct · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions

Problem

Consider the following two balanced half-reactions occurring in acidic solution. Reduction:

\text{IO}_3^- + 6\,\text{H}^+ + 6\,e^- \rightarrow \text{I}^- + 3\,\text{H}_2\text{O}

Oxidation:

\text{H}_2\text{O}_2 \rightarrow \text{O}_2 + 2\,\text{H}^+ + 2\,e^-

When these half-reactions are combined to obtain the overall net ionic equation, what is the coefficient of

\text{O}_2

in the balanced equation? (a) 6 (b) 3 (c) 2 (d) 1