Activity Coefficients of Potassium Hydrogen Tartrate in Aqueous Solutions with Potassium Chloride at Temperatures Between 278.15 and 298.15 K

摘要

The activities of the potassium salt of tartaric acid were obtained by an indirect potentiometric method that requires the presence in the solution of a second salt with a common ion and for which a specific electrode is available.In this study,KC1 was used as the second electrolyte.Experimental data were obtained for KHT concentrations varying from 0.005 to 0.015 m,with concentrations in KCl ranging from 0.01 to 0.03 m between 278.15 and 298.15 K.To describe the non-ideal behaviour of the electrolytes in single-salt and in mixed systems,the molal ion-interaction model proposed by Pitzer was used.