1) Сu + 2H2SO4 (k) = CuSO4 + SO2 + 2H2O
2) 3SO2 + 2KMnO4 + 2H2O = K2SO4 + 2MnO2 + 2H2SO4
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1) Сu + 2H2SO4 (k) = CuSO4 + SO2 + 2H2O
2) 3SO2 + 2KMnO4 + 2H2O = K2SO4 + 2MnO2 + 2H2SO4