Срочно !!! 3. Определите, какие из реакций являются ОВР:
HgO = Hg + O2
Fe + Cl2 = FeCl3
Ba(NO3)2 + K2CO3 = KNO3 + BaCO3
CO + O2 = CO2
Al2O3 + Mg = MgO + Al
NaOH + H2SO4 = Na2SO4 + H2O
Cu(OH)2 = CuO + H2O
SO2 + O2 = SO3
KClO3 = KCl + O2
Cl2O7 + H2O = HClO4
HCl + KOH = KCl + H2O
Fe2O3 + HCl = FeCl3 + H2O
Mg + H3PO4 = Mg3(PO4)2 + H2
Fe(OH)3 = Fe2O3 + H2O
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