In alkaline medium, \(\mathrm{MnO}_{4}^{-}\) oxidises I^- to

CONCEPT:

Oxidation in Alkaline Medium

• In an alkaline medium, the oxidation states of various species can change due to the presence of hydroxide ions (OH^-).
• Permanganate ion (MnO₄^-) is a strong oxidizing agent, and its ability to oxidize other species varies with the medium (acidic, neutral, or alkaline).

EXPLANATION:

• In an alkaline medium, MnO₄^- oxidizes iodide ions (I^-) to iodate ions (IO₃^-).
• The balanced half-reaction for the oxidation of I^- in alkaline medium is:

  MnO₄^- + I^- + OH^- → IO₃^- + MnO₂ + H₂O

Therefore, in alkaline medium, MnO₄^- oxidizes I^- to IO₃^-.