Give reaction of KMnO4 with KI in (i) Acidic medium,(ii) Alkaline medium

CBSE Class 12
1

Give reaction of KMnO4 with KI in
(i) Acidic medium,
(ii) Alkaline medium.

2

Acidic medium: Iodine is liberated from potassium iodide
10I- + 2MnO4- + 16H+ → 2Mn2+ + 8H2O + 5I2
Alkaline medium: Iodide is oxidized to iodate
2MnO4- + H2O + I-→ 2MnO2 + 2OH- + IO3-