已知同温度下溶解度:Zn(OH)2>ZnS,MgCO3>Mg(OH)2;就溶解或电离出S2-的能力而言,FeS>H2S>CuS,则下列离子方程式错误的是
A.Mg2++2HCO3-+2Ca2++4OH- = Mg(OH)2↓+2CaCO3↓+2H2O |
B.Cu2++H2S = CuS↓+2H+ |
C.Zn2++S2-+2H2O = Zn(OH)2↓+H2S↑ |
D.FeS+2H+ = Fe2++H2 S↑ |
已知同温度下溶解度:Zn(OH)2>ZnS,MgCO3>Mg(OH)2;就溶解或电离出S2-的能力而言,FeS>H2S>CuS,则下列离子方程式错误的是
A.Mg2++2HCO3-+2Ca2++4OH- = Mg(OH)2↓+2CaCO3↓+2H2O |
B.Cu2++H2S = CuS↓+2H+ |
C.Zn2++S2-+2H2O = Zn(OH)2↓+H2S↑ |
D.FeS+2H+ = Fe2++H2 S↑ |