(1)向50ml0.018mol/L的AgNO3溶液中加入50ml0.018mol/L的盐酸,混合后两者浓度分别为
c(Ag+)=
=0.009 mol/L,0.018 2
c(Cl-)=
=0.0091mol/L,0.018 2
Ag+与Cl-是等物质的量反应的,则:c(Ag+)=
=1.0×10-5mol/L;
1.0×10?10
故答案为:1.0×10-5mol/L;
(2)向50ml0.018mol/L的AgNO3溶液中加入50ml0.02mol/L的盐酸,混合后两者浓度分别为c(Ag+)=
mol/L=0.009 mol/L、c(Cl-)=0.018 2
mol/L=0.01mol/L,Ag+与Cl-是等物质的量反应的,此时Cl-过量,过量浓度c(Cl-)=0.01-0.009=0.001mol/L,0.02 2
Ksp=c(Ag+)×C(Cl-)=1.0×10-10,则:c(Ag+)=
=1.0×10-7mol/L;沉淀生成后,氢离子浓度c=1.0×10?10
0.001
=0.01mol/L,所以pH=2,0.02mol/L 2
故答案为:1.0×10-7mol/L;2.