4硝酸铅[Pb(NO3)2]的稀溶液中滴入几滴稀Na2SO4溶液,生成白色PbSO4沉淀,再滴入数滴饱和醋酸钠(CH3COONa) 溶液,微热,并不断搅拌,沉淀缓慢溶解。以上发生的都是复分解反应,思考回答:(1)写出反应过程的离子方程式:;;(2)第二步离子反应发生的原因是___(已知醋酸铅可溶于水)。 5 硝酸铅(Pb(NO 3 ) 2 )...
NO3- Net Ionic Equation The balanced net ionic equation includes only species that are involved in the reaction. It can be found by removing ions that occur on both the reactant and product side of the complete ionic equation. SO42-(aq)+ Pb2+(aq)= PbSO4(s) ...
硝酸铅(Pb(NO3)2)的稀溶液中滴入几滴稀Na2SO4溶液,生成白色PbSO4沉淀,再滴入数滴饱和醋酸钠(CH3COONa)溶液,微热,并不断搅拌,沉淀缓慢溶解.以上发生的都是复分解反应,写出反应过程的离子方程式: ___; ___. 第二步离子反应发生的原因是___(已知醋酸铅可溶于水). 试题答案...
NO3- Net Ionic Equation The balanced net ionic equation includes only species that are involved in the reaction. It can be found by removing ions that occur on both the reactant and product side of the complete ionic equation. SO42-(aq)+ Pb2+(aq)= PbSO4(s) ...
产生PbI2沉淀需要 c(Pb^(2+))=K_p^Θ(PbI_2)/c^2(T^-)=8.0*10^(-3)mol⋅L^(-1) ;产生 PbSO4沉淀需要 c(Pb2+)=K_(sp)^Θ(PbSO_4)/c(SO_4^(2-))=1.8*10^(-7)mol ·L-';因此PbSO4先沉淀。sp当SO沉淀完全时,溶液中c(Pb2)=K(PbSO4Vc(SO)=1.8×10/106=1.8×102(mol·L...
Qc＝（0.01/2）×（0.01/2）将Qc值与硫酸铅的Ksp比较 若大于Ksp，则可以生成沉淀。反之没有 水解平衡常数等于Kw/Ka 根据题目中给出的浓度求得Ka，即可求出水解平衡常数 亲~可以理解嘛 亲~可以看到图片嘛 已经发过去了哈 亲~可以理解嘛 ...
Pb(NO3)2的稀溶液中滴人几滴稀Na2SO4.生成白色PbSO4沉淀.再滴入数滴饱和醋酸钠溶液.微热并不断搅动.沉淀慢慢溶解.以上发生的都是复分解反应.写出反应过程的离子方程式: ,试分析第二步离子反应进行的原因: .
配平下列化学方程式:(1)□Pb(NO3)2=□PbO+□NO2↑+□O2↑(2)□Al2(SO4)3+□NaOH=□Al(OH)3↓+□Na2SO4
NO3- Net Ionic Equation The balanced net ionic equation includes only species that are involved in the reaction. It can be found by removing ions that occur on both the reactant and product side of the complete ionic equation. SO42-(aq)+ Pb2+(aq)= PbSO4(s) ...
【题目】配平下列化学方程式并填空:(1)Pb(NO3)2△:PbO+NO2↑+O2↑(2)Al2(SO4)3+NaOH=A(OH)3↓+Na2SO4·