Question

Manganese (VI) has ability to disproportionate in acidic solution. The difference in oxidation states of two ions it forms in acidic solution is _____.

Answer 1

Manganese (VI) disproportionates in acidic medium as:

$3 MnO_2^{-4} + 4H^+ → 2MnO_4^- + MnO_2 + 2H_2O$

Difference in oxidation states of Mn in the products formed = 7 – 4 = 3

So, the answer is 3.