Сr2O3 + 3Mg = 3MgO +2 Cr
Cr(+3) +3e = Cr(0) 2 ок-ль
Mg(0) -2e = Mg(+2) 3 в-ль
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Сr2O3 + 3Mg = 3MgO +2 Cr
Cr(+3) +3e = Cr(0) 2 ок-ль
Mg(0) -2e = Mg(+2) 3 в-ль