Thermodynamic properties of the dilute solutions of silver chloride and aluminum trichloride in alkali chlorides by electromotive force measurements

Abstract

Thermodynamic data for dilute solutions of AgCl and AlCl3 in molten alkali chlorides were derived from the emf's of formation and of galvanic cells, respectively, given as, Ag/AgCl–ACl/C,Cl2 and Ag/AgCl–ACl//AlCl3–ACl/Al. ACl represents NaCl, KCl, CsCl, or the equimolar mixtures of NaCl–CsCl and KCl–CsCl. It was found that the thermodynamic properties of the ternary melts could be predicted from the results of the binary melts using the relationship (17, 20, 21), [Formula: see text] where Z represents any partial molar property. The ternary solution is denoted by the subscript 1, 2, 3 while the two binaries are denoted by 1, 2 and 1, 3; t is a concentration variable given as t = X3/(X2 + X3). These expressions are valid when the binary and the ternary solutions have the same content of either AgCl or AlCl3, respectively.