In the neutral or faintly alkaline medium, KMnO _ 4 oxidises iodide...

${KMnO}_{4}$ acts as an oxidising agent. In neutral or faintly alkaline medium When alkaline ${KMnO}_{4}$ is treated with $KI$, iodide ion is oxidised to iodate $\left({{IO}_{3}}^{-}\right)$ and ${KMnO}_{4}isreducedto{MnO}_{2}$. The chemical reaction can be given as,

$2{KMnO}_{4} + {H}_{2}O + KI \to 2{MnO}_{2} + 2KOH + {KIO}_{3}$

The change in oxidation state of manganese in this reaction is from $+ 7to + 4 .</p>$