Appendix

1090 Analytical Chemistry 2.0Appendix 10: Solubility ProductsThe following table provides pK sp and K sp values for selected compounds, organized by the anion. All valuesare from Martell, A. E.; Smith, R. M. Critical Stability Constants, Vol. 4. Plenum Press: New York, 1976. Unlessotherwise stated, values are for 25 o C and zero ionic strength.Bromide (Br – ) pK sp K spCuBr 8.3 5.×10 –9AgBr 12.30 5.0×10 –13Hg 2 Br 2 22.25 5.6×10 –13HgBr 2 (m = 0.5 M) 18.9 1.3×10 –19PbBr 2 (m = 4.0 M) 5.68 2.1×10 –6Carbonate (CO 2– 3 ) pK sp K spMgCO 3 7.46 3.5×10 –8CaCO 3 (calcite) 8.35 4.5×10 –9CaCO 3 (aragonite) 8.22 6.0×10 –9SrCO 3 9.03 9.3×10 –10BaCO 3 8.30 5.0×10 –9MnCO 3 9.30 5.0×10 –10FeCO 3 10.68 2.1×10 –11CoCO 3 9.98 1.0×10 –10NiCO 3 6.87 1.3×10 –7Ag 2 CO 3 11.09 8.1×10 –12Hg 2 CO 3 16.05 8.9×10 –17ZnCO 3 10.00 1.0×10 –10CdCO 3 13.74 1.8×10 –14PbCO 3 13.13 7.4×10 –14Chloride (Cl – ) pK sp K spCuCl 6.73 1.9×10 –7AgCl 9.74 1.8×10 –10Hg 2 Cl 2 17.91 1.2×10 –18PbCl 2 4.78 2.0×10 –19