C6H5CH3 + KMnO4 + HNO3 = C6H5COOH +KNO3 + Mn(NO3)2 + H2O

MnO4(-)+8H(+)+5e=Mn(2+)+4H2O
C6H5CH3+6H(+)+6e=C6H5COOH+2H2O

5C6H5CH3 + 6 KMnO4 + 18HNO3 = 5C6H5COOH +6KNO3 + 6Mn(NO3)2 + 24H2O

все слово "сложность" понимают по-разному!

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