Solubility of potassium fluoride in aqueous solution at different temperatures 298.15K-353.15K

Abstract

In this investigation, the binary aqueous solutions of Potassium Fluoride have been studied using the hygrometric method at different temperatures 298.15K-353.15K. The water activities are measured at molalities from 0.10 mol kg-1 to saturation. The obtained data allow the deduction of osmotic coefficients. From these measurements, the ionic parameters are determined and used to predict the solute activity coefficients. Thermodynamic characteristics, solubility products K°sp and the standard molar Gibbs energy of dissolution ΔG°diss are given. The predicted solubility isotherms are compared with the literature data. © Owned by the authors, published by EDP Sciences, 2013.