SOLUBILITY OF BORIC-ACID IN AQUEOUS-SOLUTIONS OF CHLORIDE SALTS

Solubility of boric acid in aqueous solutions of sodium chloride, pota ssium chloride and of both sodium and potassium chlorides was measured in a wide range of salt concentrations at temperatures from 303-373 K . These data, together with solubility data of chloride salts in aqueo us solutions of boric acid, are used to parameterize a general thermod ynamic model which uses the Wilson equation, along with contributions from Debye-Huckel and a Born term, in order to express the activity co efficients. The model, which contains only binary interaction paramete rs, can be used to correlate and predict thermodynamic properties of m ulticomponent aqueous systems containing boric acid along with both so dium and potassium chlorides.