Solubility Product Constants (Ksp at 25 oC)

Type Formula Ksp
Bromides PbBr2 6.3 × 10-6


AgBr 3.3 × 10-13
Carbonates BaCO3 8.1 × 10-9


CaCO3 3.8 × 10-9


CoCO3 8.0 × 10-13


CuCO3 2.5 × 10-10


FeCO3 3.5 × 10-11


PbCO3 1.5 × 10-13


MgCO3 4.0 × 10-5


MnCO3 1.8 × 10-11


NiCO3 6.6 × 10-9


Ag2CO3 8.1 × 10-12


ZnCO3 1.5 × 10-11
Chlorides PbCl2 1.7 × 10-5


AgCl 1.8 × 10-10
Chromates BaCrO4 2.0 × 10-10


CaCrO4 7.1 × 10-4


PbCrO4 1.8 × 10-14


Ag2CrO4 9.0 × 10-12
Cyanides Ni(CN)2 3.0 × 10-23


AgCN 1.2 × 10-16


Zn(CN)2 8.0 × 10-12
Fluorides BaF2 1.7 × 10-6


CaF2 3.9 × 10-11


PbF2 3.7 × 10-8


MgF2 6.4 × 10-9
Hydroxides AgOH 2.0 × 10-8


Al(OH)3 1.9 × 10-33


Ca(OH)2 7.9 × 10-6


Cr(OH)3 6.7 × 10-31


Co(OH)2 2.5 × 10-16


Cu(OH)2 1.6 × 10-19


Fe(OH)2 7.9 × 10-15


Fe(OH)3 6.3 × 10-38


Pb(OH)2 2.8 × 10-16


Mg(OH)2 1.5 × 10-11


Mn(OH)2 4.6 × 10-14


Ni(OH)2 2.8 × 10-16


Zn(OH)2 4.5 × 10-17
Iodides PbI2 8.7 × 10-9


AgI 1.5 × 10-16
Oxalates BaC2O4 1.1 × 10-7


CaC2O4 2.3 × 10-9


MgC2O4 8.6 × 10-5
Phosphates AlPO4 1.3 × 10-20


Ba3(PO4)2 1.3 × 10-29


Ca3(PO4)2 1.0 × 10-25


CrPO4 2.4 × 10-23


Pb3(PO4)2 3.0 × 10-44


Ag3PO4 1.3 × 10-20


Zn3(PO4)2 9.1 × 10-33
Sulfates BaSO4 1.1 × 10-10


CaSO4 2.4 × 10-5


PbSO4 1.8 × 10-8


Ag2SO4 1.7 × 10-5
Sulfides CaS 8 × 10-6


CoS 5.9 × 10-21


CuS 7.9 × 10-37


FeS 4.9 × 10-18


Fe2S3 1.4 × 10-88


PbS 3.2 × 10-28


MnS 5.1 × 10-15


NiS 3.0 × 10-21


Ag2S 1.0 × 10-49


ZnS 2.0 × 10-25
Sulfites BaSO3 8.0 × 10-7


CaSO3 1.3 × 10-8


Ag2SO3 1.5 × 10-14