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.
Highlights
Fluorides are of great interest as the fundamental level at industrial scale
We relied on an experimental hygrometric method1 and thermodynamic considerations based on the ionic interaction [2, 3] for the prediction of mineral solubility of potassium fluoride KF at different temperatures
The apparatus used in this study of aqueous single electrolyte solutions (Figure 1)
Summary
Fluorides are of great interest as the fundamental level at industrial scale These fluorides in aqueous come in several application areas occupied in industry. Their presence is evident in the phosphate industry, during the production of phosphoric acid. The study of electrolytes is fundamentally important to understand the properties and behavior of aqueous multicomponent systems. Knowledge of their properties allows understanding of the phenomena governing the industrial processes. We relied on an experimental hygrometric method and thermodynamic considerations based on the ionic interaction [2, 3] for the prediction of mineral solubility of potassium fluoride KF at different temperatures
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