Abstract
A partial long-range order model for aqueous electrolyte solutions is proposed to avoid contradictions present in the Debye-Huckel theory. The partial long-range order increases with increasing salt concentration because, as the ions are closer together, the coulombic energy of interaction which generates a quasi-lattice increases. Furthermore, the order decreases with increasing temperature because the thermal energy increases relative to the coulombic attraction of the ions. The long-range order parameter L and a parameter v which results from fluctuations and other effects are obtained for LiCl, NaCl and KCl by comparing the theoretical configurational free energy to the electrical free energy obtained from the experimental activity coefficients. The specific interaction and the cluster integral models are discussed briefly at the end of this work.
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