pH=8.0,[H+]=10^-8mol/L
Ka=10^-8*[S2-]/0.1=1.1*10^-22
[S2-]=1.1*10^-15
Ksp=[Cd2+]*[S2-]
=[Cd2+]*1.1*10^-15=7.9*10^-27
[Cd2+]=7.2*10^-12
pH=8.0,[H+]=10^-8mol/L
Ka=10^-8*[S2-]/0.1=1.1*10^-22
[S2-]=1.1*10^-15
Ksp=[Cd2+]*[S2-]
=[Cd2+]*1.1*10^-15=7.9*10^-27
[Cd2+]=7.2*10^-12