Macroscopic and microscopic acid dissociation constants of diprotic acids--a potentiometric and spectrophotometric study.
A state-of-the-art survey of the determination of acid dissociation microconstants of diprotic acids is presented. It is shown that potentiometric and spectrophotometric titration data can yield macroscopic constants but are not sufficient to completely resolve the microconstant system unless some sort of assumption is made, which may not always be warranted. Such an estimative deduction procedure is applied to 2,6-di(methylthiomethyl)-3-hydroxypyridine chloride.
Uguagliati
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Dipartimento di Chimica, Facoltà di Scienze, Università di Venezia, S. Marta, Venezia, Italy.
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