Методом ионно-электронного баланса найти коэффициенты в уравнениях реакций:
347) K2SO3 + K2S + HCl = S + KCl + H2O H2SO3 + Cl2 + H2O = H2SO4 + HCl
KMnO4 + H2O2 + KOH = K2MnO4 + O2 + H2O
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