Water activities, activity coefficients and solubility in the binary and ternary aqueous solutions LiCl+Y Cl2+H2O with Y≡Mg2+;Ca2+;orBa2+

摘要: Abstract In this investigation, the ternary aqueous solutions of lithium chloride with alkaline earth metal {yLiCl+(1−y)Y Cl2}(aq) Y Mg2+; Ca2+; and Ba2+ have been studied using hygrometric method at 298.15 K. The water activities are measured total molalities from 0.20 mol kg−1 to saturation for different ionic-strength fractions y LiCl = 0.20 , 0.50 0.80. obtained data allow deduction osmotic coefficients. From these measurements, mixing ionic parameters θ LiY ψ Cl determined used predict solute activity coefficients in mixtures. Also, we completed measurements 6 mol kg−1 pure electrolyte CaCl2(aq) method. Few studies extended their (11.00 mol kg−1 CaCl2⋅2H2O). These results compared those by other techniques. values ionic-interaction parameters, which give best fit binary, solubility tabulated. Thermodynamic characteristics, products K s p ∘ standard molar Gibbs energy formation Δ G f m 0 crystallizing solids given. predicted isotherms literature data. behaviour alkaline-earth chlorides Ca2+ or Ba2+, is correlated show that interactions essentially related nature combined LiCl.