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Solubility Product Constants near 25 oC.




Substance Formula Ksp
Aluminum hydroxide Al(OH)3 1.3×10–33
Aluminum phosphate AlPO4 6.3×10–19
Barium carbonate BaCO3 5.1×10–9
Barium chromate BaCrO4 1.2×10–10
Barium fluoride BaF2 1.0×10–6
Barium hydroxide Ba(OH)2 5×10–3
Barium sulfate BaSO4 1.1×10–10
Barium sulfite BaSO3 8×10–7
Barium thiosulfate BaS2O3 1.6×10–6
Bismuthyl chloride BiOCl 1.8×10–31
Bismuthyl hydroxide BiOOH 4×10–10
Cadmium carbonate CdCO3 5.2×10–12
Cadmium hydroxide Cd(OH)2 2.5×10–14
Cadmium oxalate CdC2O4 1.5×10–8
Cadmium sulfide* CdS 8×10–28
Calcium carbonate CaCO3 2.8×10–9
Calcium chromate CaCrO4 7.1×10–4
Calcium fluoride CaF2 5.3×10–9
Calcium hydrogen phosphate CaHPO4 1×10–7
Calcium hydroxide Ca(OH)2 5.5×10–6
Calcium oxalate CaC2O4 2.7×10–9
Calcium phosphate Ca3(PO4)2 2.0×10–29
Calcium sulfate CaSO4 9.1×10–6
Calcium sulfite CaSO3 6.8×10–8
Chromium(II) hydroxide Cr(OH)2 2×10–16
Chromium(III) hydroxide Cr(OH)3 6.3×10–31
Cobalt(II) carbonate CoCO3 1.4×10–13
Cobalt(II) hydroxide Co(OH)2 1.6×10–15
Cobalt(III) hydroxide Co(OH)3 1.6×10–44
Cobalt(II) sulfide* CoS 4×10–21
Copper(I) chloride CuCl 1.2×10–6
Copper(I) cyanide CuCN 3.2×10–20
Copper(I) iodide CuI 1.1×10–12
Copper(II) arsenate Cu3(AsO4)2 7.6×10–36
Copper(II) carbonate CuCO3 1.4×10–10
Copper(II) chromate CuCrO4 3.6×10–6
Copper(II) ferrocyanide Cu[Fe(CN)6] 1.3×10–16
Copper(II) hydroxide Cu(OH)2 2.2×10–20
Copper(II) sulfide* CuS 6×10–37
Iron(II) carbonate FeCO3 3.2×10–11
Iron(II) hydroxide Fe(OH)2 8.0×10–16
Iron(II) sulfide* FeS 6×10–19
Iron(III) arsenate FeAsO4 5.7×10–21
Iron(III) ferrocyanide Fe4[Fe(CN)6]3 3.3×10–41
Iron(III) hydroxide Fe(OH)3 4×10–38
Iron(III) phosphate FePO4 1.3×10–22
Lead(II) arsenate Pb3(AsO4)2 4×10–36
Lead(II) azide Pb(N3)2 2.5×10–9
Lead(II) bromide PbBr2 4.0×10–5
Lead(II) carbonate PbCO3 7.4×10–14
Lead(II) chloride PbCl2 1.6×10–5
Lead(II) chromate PbCrO4 2.8×10–13
Lead(II) fluoride PbF2 2.7×10–8
Lead(II) hydroxide Pb(OH)2 1.2×10–15
Lead(II) iodide PbI2 7.1×10–9
Lead(II) sulfate PbSO4 1.6×10–8
Lead(II) sulfide* PbS 3×10–28
Lithium carbonate Li2CO3 2.5×10–2
Lithium fluoride LiF 3.8×10–3
Lithium phosphate Li3PO4 3.2×10–9
Magnesium ammonium phosphate MgNH4PO4 2.5×10–13
Magnesium arsenate Mg3(AsO4)2 2×10–20
Magnesium carbonate MgCO3 3.5×10–8
Magnesium fluoride MgF2 3.7×10–8
Magnesium hydroxide Mg(OH)2 1.8×10–11
Magnesium oxalate MgC2O4 8.5×10–5
Magnesium phosphate Mg3(PO4)2 1×10–25
Manganese(II) carbonate MnCO3 1.8×10–11
Manganese(II) hydroxide Mn(OH)2 1.9×10–13
Manganese(II) sulfide* MnS 3×10–14
Mercury(I) bromide Hg2Br2 5.6×10–23
Mercury(I) chloride Hg2Cl2 1.3×10–18
Mercury(I) iodide Hg2I2 4.5×10–29
Mercury(II) sulfide* HgS 2×10–53
Nickel(II) carbonate NiCO3 6.6×10–9
Nickel(II) hydroxide Ni(OH)2 2.0×10–15
Nickel(II) sulfide* NiS 3×10–19
Scandium fluoride ScF3 4.2×10–18
Scandium hydroxide Sc(OH)3 8.0×10–31
Silver acetate AgC2H3O2 2.0×10–3
Silver arsenate Ag3AsO4 1.0×10–22
Silver azide AgN3 2.8×10–9
Silver bromide AgBr 5.0×10–13
Silver chloride AgCl 1.8×10–10
Silver chromate Ag2CrO4 1.1×10–12
Silver cyanide AgCN 1.2×10–16
Silver iodate AgIO3 3.0×10–8
Silver iodide AgI 8.5×10–17
Silver nitrite AgNO2 6.0×10–4
Silver sulfate Ag2SO4 1.4×10–5
Silver sulfide* Ag2S 6×10–51
Silver sulfite Ag2SO3 1.5×10–14
Silver thiocyanate AgSCN 1.0×10–12
Strontium carbonate SrCO3 1.1×10–10
Strontium chromate SrCrO4 2.2×10–5
Strontium fluoride SrF2 2.5×10–9
Strontium sulfate SrSO4 3.2×10–7
Thallium(I) bromide TlBr 3.4×10–6
Thallium(I) chloride TlCl 1.7×10–4
Thallium (I) iodide TlI 6.5×10–8
Thallium(III) hydroxide Tl(OH)3 6.3×10–46
Tin(II) hydroxide Sn(OH)2 1.4×10–28
Tin(II) sulfide* SnS 1×10–26
Zinc carbonate ZnCO3 1.4×10–11
Zinc hydroxide Zn(OH)2 1.2×10–17
Zinc oxalate ZnC2O4 2.7×10–8
Zinc phosphate Zn3(PO4)2 9.0×10–33
Zinc sulfide* ZnS 2×10–25

* Sulfide equilibrium of the type:
MS(s)  +  H2O(l)    M2+(aq)  +  HS–(aq)  +  OH–(aq)