${2MnO}_4^{-}+10{\mathrm{I}}^{-}+16{\mathrm{H}}^{+}\to 2M{\mathrm{n}}^{2+}+5{\mathrm{I}}_2+8{\mathrm{H}}_2\mathrm{O}$

$2CuBr\to \mathrm{CuB}{\mathrm{r}}_2+\mathrm{Cu}$

$2KMn{\mathrm{O}}_4\to {\mathrm{K}}_2\mathrm{Mn}{\mathrm{O}}_4+\mathrm{Mn}{\mathrm{O}}_2+{\mathrm{O}}_2$

$2NaBr+\mathrm{C}{\mathrm{l}}_2\to 2NaCl+\mathrm{B}{\mathrm{r}}_2$