Chapter 14, Problem 52QP

Balance the following half-reactions, adding ${\text{H}}^{+}\left(aq\right),{\text{H}}_2\text{O}\left(l\right),$ and electrons as appropriate.

$\begin{array}{l}\left(\text{a}\right){\text{ Br}}_{\text{2}}\left(aq\right)\to {\text{Br}}^{-}\left(aq\right)\hfill \\ \left(\text{b}\right){\text{ H}}_{\text{2}}\text{O}\left(l\right)\to {\text{O}}_{\text{2}}\left(g\right)\hfill \\ \left(\text{c}\right){\text{ IO}}_3^{-}\left(aq\right)\to {\text{I}}_{\text{2}}\left(aq\right)\hfill \\ \left(\text{d}\right){\text{ MnO}}_{\text{2}}\left(s\right)\to {\text{Mn}}^{2+}\left(aq\right)\hfill \end{array}$