title: General treatment of pH-solubility profiles of weak acids and bases and the effects of different acids on the solubility of a weak base.
abstract: The pH-solubility profile of a weak acid or base is shown to be a function of its pKsp, pKa, and uncharged species solubility. Equations are presented that can be used to calculate the solubility as a function of pH. These equations can also be used when there is added salt present. Experimental data was obtained in three cosolvent systems consisting of methanol-water and ethanol-water. Also, the effect of different acids on the solubility of a weak base is reported. A pronounced effect on the solubility by the addition of salt is explained in terms of the Ksp.
mesh_terms: D000143:Acids; D000468:Alkalies; D055598:Chemical Phenomena; D002621:Chemistry; D006863:Hydrogen-Ion Concentration; D012995:Solubility
chemical_list: D000143:Acids; D000468:Alkalies