Abstract

The application of a computer program for the conductimetric–potentiometric determination of acid concentrations in a mixture characterized by small differences in the dissociation constants of the components is described. The conductimetric method is based on the technique of graphical direction lines, thus providing data on the concentrations of H3O+ ions and the undissociated portion of [HA]. Together with acid dissociation constants, these data were used for calculating the concentrations of individual components of the mixture, dissociation of acid degree, pH and dissociation constant. The same solution was analysed separately by the conductimetric and potentiometric methods for comparison.

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