Cr2O3+NaOH=комплексная соль.
напишите уравнения реакции с коэффицентами
Cr2O3+6NaOH + 3H2O = 2Na3[Cr(OH)6]
Cr2O3+2NaOH=Na2Cr2O4+H2O
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Cr2O3+6NaOH + 3H2O = 2Na3[Cr(OH)6]
Cr2O3+2NaOH=Na2Cr2O4+H2O