已知硫酸铅难溶于水,也难溶于硝酸,却可溶于醋酸铵溶液中形成无色溶液,其化学方程式为:
PbSO4(s)+2CH3COONH4(aq)===(CH3COO)2Pb(aq)+(NH4)2SO4(aq)。当在(CH3COO)2Pb溶液中通入H2S时,有黑色沉淀PbS生成,表示这个反应的离子方程式正确的是( )
A.(CH3COO)2Pb+H2S===PbS↓+2CH3COOH |
B.Pb2++H2S===PbS↓+2H+ |
C.Pb2++2CH3COO-+H2S===PbS↓+2CH3COOH |
D.Pb2++2CH3COO-+2H++S2-===PbS↓+2CH3COOH |