CH3-CH=CH-CH3 + KMnO4 + H2SO4 =
5CH3-CH=CH-CH3+8KMnO4+12H2SO4->10CH3-COOH + 8MnSO4 + 4K2SO4 + 12H2O 2C-1 -8e- = 2C+3 | 8 | | 5 | | 40 | Mn+7 +5e- = Mn2+ | 5 | | 8 |