General equation for determining the dissociation constants of polyprotic acids and bases from additive properties. Part II. Applications |
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Authors: | Issam Jano and James E. Hardcastle |
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Affiliation: | Department of Chemistry and Physics, Texas Woman's University, Denton, TX 76204, USA |
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Abstract: | Dissociation constants of some polyprotic acids and bases are determined from spectrophotometric and reversed-phase high performance liquid chromatographic data. A general equation relating additive properties of acids and bases to the pH of the solution is used for this purpose. The method is tested by applying it to the calculation of overlapping pKas without the prerequisite of measuring the limiting values of the property for the individual species that result from the dissociation of the solute. The possibility of applying the same method to hyperpolarizability measurements is pointed out, and a procedure, based on the general equation, for obtaining the activity coefficients of the ionic species as a function of the ionic strength is also suggested. |
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Keywords: | Dissociation constants Polyprotic acids and bases General method Spectrophotometry Reversed-phase high performance liquid chromatography Hyperpolarizability Activity coefficients |
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