Solubility Product Constants near 25 oC.
Substance |
Formula |
Ksp |
Aluminum hydroxide |
Al(OH)3 |
1.3×1033 |
Aluminum phosphate |
AlPO4 |
6.3×1019 |
Barium carbonate |
BaCO3 |
5.1×109 |
Barium chromate |
BaCrO4 |
1.2×1010 |
Barium fluoride |
BaF2 |
1.0×106 |
Barium hydroxide |
Ba(OH)2 |
5×103 |
Barium sulfate |
BaSO4 |
1.1×1010 |
Barium sulfite |
BaSO3 |
8×107 |
Barium thiosulfate |
BaS2O3 |
1.6×106 |
Bismuthyl chloride |
BiOCl |
1.8×1031 |
Bismuthyl hydroxide |
BiOOH |
4×1010 |
Cadmium carbonate |
CdCO3 |
5.2×1012 |
Cadmium hydroxide |
Cd(OH)2 |
2.5×1014 |
Cadmium oxalate |
CdC2O4 |
1.5×108 |
Cadmium sulfide* |
CdS |
8×1028 |
Calcium carbonate |
CaCO3 |
2.8×109 |
Calcium chromate |
CaCrO4 |
7.1×104 |
Calcium fluoride |
CaF2 |
5.3×109 |
Calcium hydrogen phosphate |
CaHPO4 |
1×107 |
Calcium hydroxide |
Ca(OH)2 |
5.5×106 |
Calcium oxalate |
CaC2O4 |
2.7×109 |
Calcium phosphate |
Ca3(PO4)2 |
2.0×1029 |
Calcium sulfate |
CaSO4 |
9.1×106 |
Calcium sulfite |
CaSO3 |
6.8×108 |
Chromium(II) hydroxide |
Cr(OH)2 |
2×1016 |
Chromium(III) hydroxide |
Cr(OH)3 |
6.3×1031 |
Cobalt(II) carbonate |
CoCO3 |
1.4×1013 |
Cobalt(II) hydroxide |
Co(OH)2 |
1.6×1015 |
Cobalt(III) hydroxide |
Co(OH)3 |
1.6×1044 |
Cobalt(II) sulfide* |
CoS |
4×1021 |
Copper(I) chloride |
CuCl |
1.2×106 |
Copper(I) cyanide |
CuCN |
3.2×1020 |
Copper(I) iodide |
CuI |
1.1×1012 |
Copper(II) arsenate |
Cu3(AsO4)2 |
7.6×1036 |
Copper(II) carbonate |
CuCO3 |
1.4×1010 |
Copper(II) chromate |
CuCrO4 |
3.6×106 |
Copper(II) ferrocyanide |
Cu[Fe(CN)6] |
1.3×1016 |
Copper(II) hydroxide |
Cu(OH)2 |
2.2×1020 |
Copper(II) sulfide* |
CuS |
6×1037 |
Iron(II) carbonate |
FeCO3 |
3.2×1011 |
Iron(II) hydroxide |
Fe(OH)2 |
8.0×1016 |
Iron(II) sulfide* |
FeS |
6×1019 |
Iron(III) arsenate |
FeAsO4 |
5.7×1021 |
Iron(III) ferrocyanide |
Fe4[Fe(CN)6]3 |
3.3×1041 |
Iron(III) hydroxide |
Fe(OH)3 |
4×1038 |
Iron(III) phosphate |
FePO4 |
1.3×1022 |
Lead(II) arsenate |
Pb3(AsO4)2 |
4×1036 |
Lead(II) azide |
Pb(N3)2 |
2.5×109 |
Lead(II) bromide |
PbBr2 |
4.0×105 |
Lead(II) carbonate |
PbCO3 |
7.4×1014 |
Lead(II) chloride |
PbCl2 |
1.6×105 |
Lead(II) chromate |
PbCrO4 |
2.8×1013 |
Lead(II) fluoride |
PbF2 |
2.7×108 |
Lead(II) hydroxide |
Pb(OH)2 |
1.2×1015 |
Lead(II) iodide |
PbI2 |
7.1×109 |
Lead(II) sulfate |
PbSO4 |
1.6×108 |
Lead(II) sulfide* |
PbS |
3×1028 |
Lithium carbonate |
Li2CO3 |
2.5×102 |
Lithium fluoride |
LiF |
3.8×103 |
Lithium phosphate |
Li3PO4 |
3.2×109 |
Magnesium ammonium phosphate |
MgNH4PO4 |
2.5×1013 |
Magnesium arsenate |
Mg3(AsO4)2 |
2×1020 |
Magnesium carbonate |
MgCO3 |
3.5×108 |
Magnesium fluoride |
MgF2 |
3.7×108 |
Magnesium hydroxide |
Mg(OH)2 |
1.8×1011 |
Magnesium oxalate |
MgC2O4 |
8.5×105 |
Magnesium phosphate |
Mg3(PO4)2 |
1×1025 |
Manganese(II) carbonate |
MnCO3 |
1.8×1011 |
Manganese(II) hydroxide |
Mn(OH)2 |
1.9×1013 |
Manganese(II) sulfide* |
MnS |
3×1014 |
Mercury(I) bromide |
Hg2Br2 |
5.6×1023 |
Mercury(I) chloride |
Hg2Cl2 |
1.3×1018 |
Mercury(I) iodide |
Hg2I2 |
4.5×1029 |
Mercury(II) sulfide* |
HgS |
2×1053 |
Nickel(II) carbonate |
NiCO3 |
6.6×109 |
Nickel(II) hydroxide |
Ni(OH)2 |
2.0×1015 |
Nickel(II) sulfide* |
NiS |
3×1019 |
Scandium fluoride |
ScF3 |
4.2×1018 |
Scandium hydroxide |
Sc(OH)3 |
8.0×1031 |
Silver acetate |
AgC2H3O2 |
2.0×103 |
Silver arsenate |
Ag3AsO4 |
1.0×1022 |
Silver azide |
AgN3 |
2.8×109 |
Silver bromide |
AgBr |
5.0×1013 |
Silver chloride |
AgCl |
1.8×1010 |
Silver chromate |
Ag2CrO4 |
1.1×1012 |
Silver cyanide |
AgCN |
1.2×1016 |
Silver iodate |
AgIO3 |
3.0×108 |
Silver iodide |
AgI |
8.5×1017 |
Silver nitrite |
AgNO2 |
6.0×104 |
Silver sulfate |
Ag2SO4 |
1.4×105 |
Silver sulfide* |
Ag2S |
6×1051 |
Silver sulfite |
Ag2SO3 |
1.5×1014 |
Silver thiocyanate |
AgSCN |
1.0×1012 |
Strontium carbonate |
SrCO3 |
1.1×1010 |
Strontium chromate |
SrCrO4 |
2.2×105 |
Strontium fluoride |
SrF2 |
2.5×109 |
Strontium sulfate |
SrSO4 |
3.2×107 |
Thallium(I) bromide |
TlBr |
3.4×106 |
Thallium(I) chloride |
TlCl |
1.7×104 |
Thallium (I) iodide |
TlI |
6.5×108 |
Thallium(III) hydroxide |
Tl(OH)3 |
6.3×1046 |
Tin(II) hydroxide |
Sn(OH)2 |
1.4×1028 |
Tin(II) sulfide* |
SnS |
1×1026 |
Zinc carbonate |
ZnCO3 |
1.4×1011 |
Zinc hydroxide |
Zn(OH)2 |
1.2×1017 |
Zinc oxalate |
ZnC2O4 |
2.7×108 |
Zinc phosphate |
Zn3(PO4)2 |
9.0×1033 |
Zinc sulfide* |
ZnS |
2×1025 |
* Sulfide equilibrium of the type:
MS(s) + H2O(l)
M2+(aq) + HS(aq)
+ OH(aq)