Conductance measurements of citric acid and neutral citrates (tri-lithium citrate, tri-sodium citrate and tri-potassium citrate) were performed in water at 278.15 to 308.15 K. The equilibrium constants for the primary and secondary steps of dissociation, Kx and K2, and the limiting conductances, λ 0 (H 2 Cit - ), λ°(1/2 HCit2 - ), and λ 0 (1/3 Cit3 - ) are reported as a function of temperature. They are obtained by application of the Quint and Viallard conductance equation. The enthalpies of dissociation are estimated.
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Apelblat et al. (1991) studied this question.
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