5CH3-C(CH3)=CH-CH2-CH3 + 6KMnO4 + 9H2SO4 ---> 5H3C-C(=O)-CH3 + 5HOOC-CH2-CH3 + 3K2SO4 + 6MnSO4 + 9H2O
C(0) -2e => C(+2). se ox (ag.red) ||5
C(-1) -4e => C(+3). se ox (ag.red) ||5
Mn(+7) +5e => Mn(+2). se red (ag.ox) ||6
5 moli alchena.....6 moli KMnO4...9 moli H2SO4
2,5 moli alchena.....x = 3 moli.....y = 4,5 moli
n KMnO4/nH2SO4 = 3/4,5 = 30/45 = 6/9 = 2/3