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The solubility and solvation of salts in mixed nonaqueous solvents. 1. Potassium halides in mixed aprotic solvents

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Abstract

The solubilities of potassium fluoride, chloride, and bromide in acetonitrile, N,N-dimethylformamide, and dimethylsulfoxide and in binary mixtures of these solvents were determined at 25°C. The standard molar Gibbs free energies of solution, ΔsolnG°, in the neat solvents were related to the polarizabilities and basicities of the anions and the dipole moments and acidities of the solvents. The values of ΔsolnG° in the mixtures were fitted by expressions from the quasi-lattice quasi-chemical theory. The mean number of each kind of solvent in the nearest environment of the ions was obtained from these results.

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Correspondence to Yizhak Marcus.

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Labban, A.K.S., Marcus, Y. The solubility and solvation of salts in mixed nonaqueous solvents. 1. Potassium halides in mixed aprotic solvents. J Solution Chem 20, 221–232 (1991). https://doi.org/10.1007/BF00649530

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Key Words

  • Solubility
  • mixed solvents
  • anion solvation
  • quasi-lattice quasi-chemical theory