July 2022 2 25 Report
Составьте уравнения окислительно-восстановительных реакций:
1) А1 + КМnО4 + H2SO4 → A12(SO4)3 + MnSO4 + K2SO4 + H2O;
2) Cu2S + HNO3 → Cu(NO3)2 + H2SO4 + NO + H2O;
3) K2Cr2O7 + SnCb + HC1 → KC1 + CrCl3 + SnCl4 + H2O.
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