Solubility-Product Constants

Solubility-Product Constants for Compounds
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Solubility-Product Constants for Compounds

 

Dissociation constants of acids and bases ka and kb respectively at 25 °C were given in a previous post. Solubility product ksp for a sparingly soluble salt M+X- in contact with its saturated solution is given by: ksp = [M+(aq)] * [X-(aq)]

The values given are at 298.15 K unless stated otherwise.

 

Table 1: Solubility-Product Constants ksp for Compounds at 25 °C (298.15K)
Name Formula ksp
Barium carbonate BaCO3 5.1 * 10-9
Barium chromate BaCrO4 2.1 * 10-10
Barium fluoride BaF2 1.7 * 10-6
Barium oxalate BaC2O4 1.6 * 10-6
Barium sulfate BaSO4 1.1 * 10-10
Cadmium carbonate CdCO3 1.8 * 10-14
Cadmium hydroxide Cd(OH)2 2.5 * 10-14
Cadmium sulfide CdS 8.0 * 10-27
Calcium carbonate CaCO3 4.5 x 10-9
Calcium chromate CaCrO4 7.1 * 10-4
Calcium fluoride CaF2 3.9 * 10-11
Calcium hydroxide Ca(OH)2 6.5 * 10-6
Calcium phosphate Ca3(PO4)2 2.0 * 10-29
Calcium sulfate CaSO4 2.4 * 10-5
Chromium(III) hydroxide Cr(OH)3 1.6 x 10-30
Cobalt(II) carbonate CoCO3 1.0 x 10-10
Cobalt(II) hydroxide Co(OH)2 1.3 * 10-15
Cobalt(II) sulfide CoS 5 * 10-22
Copper(I) bromide CuBr 5.3 * 10-9
Copper(II) carbonate CuCO3 2.3 * 10-10
Copper(II) hydroxide Cu(OH)2 4.8 * 10-20
Copper(II) sulfide CuS 6 * 10-37
Iron(II) carbonate FeCO3 2.1 * 10-11
Iron(II) hydroxide Fe(OH)2 7.9 * 10-6
Lanthanum fluoride LaF3 2.0 * 10-19
Lanthanum iodate La(IO3)3 7.4 * 10-14
Lead(II) carbonate PbCO3 7.4 * 10-14
Lead(II) chloride PbCl2 1.7 * 10-5
Lead(II) chromate PbCrO4 2.8 * 10-13
Lead(II) fluoride PbF2 3.6 * 10-8
Lead(II) sulfate PbSO4 6.3 * 10-7
Lead(II) sulfide PbS 3.0 * 10-28
Magnesium hydroxide Mg(OH)2 1.8 * 10-11
Magnesium carbonate MgCO3 3.5 * 10-8
Magnesium oxalate MgC2O4 8.6 * 10-5
Manganese(II) carbonate MnCO3 5.0 * 10-10
Manganese hydroxide Mn(OH)2 1.6 * 10-13
Manganese(II) sulfide MnS 2.0 * 10-53
Mercury(I) chloride Hg2Cl2 1.2 * 10-18
Mercury(I) iodide Hg2I2 1.1 * 10-11
Mercury(II) sulfide HgS 2.0 * 10-53
Nickel(II) carbonate NiCO3 1.3 * 10-7
Nickel(II) hydroxide Ni(OH)2 6.0 * 10-16
Nickel(II) sulfide NiS 3.0 * 10-20
Silver bromate AgBrO3 5.5 * 10-13
Silver bromide AgBr 5.0 * 10-13
Silver carbonate Ag2CO3 8.1 * 10-12
Silver chloride AgCl 1.8 * 10-10
Silver chromate Ag2CrO4 1.2 * 10-12
Silver iodide AgI 8.3 * 10-17
Silver sulfate Ag2SO4 1.5 * 10-5
Silver sulfide Ag2S 6.0 * 10-51
Strontium carbonate SrCO3 9.3 * 10-10
Tin(II) sulfide SnS 1.0 * 10-26
Zinc carbonate ZnCO3 1.0 * 10-10
Zinc hydroxide Zn(OH)2 3.0 * 10-16
Zinc oxalate ZnC2O4 2.7 * 10-8
Zinc sulfide ZnS 2.0 * 10-25

 

 

References

  1. CRC Handbook of Chemistry and Physics, 52nd edition, The Chemical Rubber Co., (1971)
  2. David W. Oxtoby, H.P. Gillis, Alan Campion, “Principles of Modern Chemistry”, Sixth Edition, Thomson Brooks/Cole, 2008
  3. Steven S. Zumdahl, “Chemical Principles”  6th Edition, Houghton Mifflin Company, 2009

Key Terms

solubility product, solubility product constants, ksp ,

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