Preferential Solvation of Ions in Aqueous Mixed Solvents

2 Preferential Solvation of Ions in Aqueous Mixed Solvents 

Different considerations are applied when the non-electrolyte is a solvent S miscible with water and is present at an appreciable concentration whereas the electrolyte is 

Cation (gases) fci (benzene) Anion fei (gases) fei (benzene) 

The following model is employed in the quasi-lattice quasi-chemical (QLQC) approach (Marcus 1983a). The ion I and the molecules of the two solvents, W and S, are distributed on sites of a quasi-lattice characterized by a lattice parameter Z that specifies the number of neighbors each particle has, independently of the nature of the 

The mutual interaction of W with S is obtained from the molar excess Gibbs energy at the equimolar composition in the absence of the ions  

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