title: Current theories in the calculation of activity coefficients-II. Specific interaction theories applied to some equilibria studies in solution chemistry.
abstract: The adequation of the current theories for calculating activity coefficients has been studied for a series of ionic equilibria in analytical chemistry: the water ionic product as well as two reactions of complex formation and oxidation-reduction. In all the cases, the specific interaction theory (SIT) has proved to be adequate and simple to apply in a restricted interval (0.5-3M), whereas Pitzer's theory is outstanding for its high precision in reproducing experimental behaviour and to correlate values of equilibrium constants for different conditions and media.
authors.affiliation: Departmento de Quimica Analítica, Universidad dei País Vasco, Apartado 644, 48080 Bilbao, Spain.
authors.forename: M P
authors.initials: MP
authors.lastname: Elizalde
authors.forename: J L
authors.initials: JL
authors.lastname: Aparicio