1. Определите окислитель и восстановитель, расставьте коэффициенты;

1) KMnO4 + K2SO3 + H2SO4 = MnSO4 + K2SO4 + H2O

2) KMnO4 + K2SO3 + H2O = MnO2 + K2SO4 + KOH

3) KMnO4 + K2SO3 + KOH = K2MnO4 + K2SO4 + H2O

4) KMnO4 + H2S + H2SO4 = MnSO4 + K2SO4 + S + H2O

5) K2Cr2O7 + SO2 + H2SO4 = Cr2(SO4)3 + K2SO4 + H2O

6) K2Cr2O7 + KI + H2SO4 = Cr2(SO4)3 + K2SO4 + I2 + H2O

7) KMnO4 + HCl = Cl2↑ + MnCl2 + KCl + H2O
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