How are electrons used in acid and basic medium ?
6 e – + 4 H2O + 2 MnO4 – → 2 MnO2 + 8 OH – 6 OH – + 3 SO32 – → 3 SO42 – + 3 H2O + 6e – Equation balanced : 2 KMnO4 + 3 Na2SO3 + H2O → 2 MnO2 + 3 Na2SO4 + 2 KOH