What happen when(i) a small amount of `Kmno_(4)` is added to concentrated `H_(2)SO_(4)` (ii) an excess amount of `KMnO_(4)` is added to concentrated `H_(2)SO_(4)` solution.

Answer

(i) `KMnO_(4)+3H_(2)SO_(4) to K^(+) + MnO_(3)^(+) (green)+3HSO_(4)^(-)+H_(3)O^(+)`
`2MnO_(3)^(+)+Na_(2)CO_(3) to 2MnO_(3)^(+)+Na_(2)CO_(3) to 2MnO_(3)+CO_(2)+1/2O_(2)+2Na^(+)`
(ii) `2KMnO_(4)+3H_(2)SO_(4) to Mn_(2)O_(7)+H_(2)SO_(4)`