А.Zn(OH)2 +2 NaOH = Na2ZnO2 +2 H2O
В.Zn(OH)2 + 3NaOH = Na2ZnO2 + 2H2O
С.ZnSO4 + 4NaOH → Na2ZnO2 + Na2SO4 + 2H2O
А.Zn(OH)2 +2 NaOH = Na2ZnO2 +2 H2O
В.Zn(OH)2 + 3NaOH = Na2ZnO2 + 2H2O
С.ZnSO4 + 4NaOH → Na2ZnO2 + Na2SO4 + 2H2O