Написать уравнения ОВР с помощью метода электронно-ионного баланса:
Cr2(SO4)3 + Na2O2 + NaOH =
KClO3 + H2C2O4 + H2SO4= ClO2 +
Br + H2SO4(к) = SO2 +
KClO3 + H2C2O4 + H2SO4 = ClO2 +
H3PO3 + Zn + H2SO4 = ZnSO4 + PH3 + H2O
KMnO4 + KBr + HCl = MnCl2 + Br2 + KCl + H2O
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