Acid-Base Equilibria in Solutions of Polybasic Acids (Model and Experiment): I. Thermodynamic Dissociation Constants of Dibasic Acids

A procedure was developed for determining the thermodynamic dissociation constants of dibasic acids when the functional groups are neutralized jointly. The procedure is based on the electroneutrality and material balance laws. The equilibrium concentrations of all the ions and dibasic acid molecules are taken into account in calculation of the activity coefficients of the species formed in the course of neutralization and of the solution ionic strength.