MANIFESTATION OF ION SPECIFICITY IN THE BEHAVIOR OF THE DYNAMIC DIELECTRIC PERMITTIVITY OF AQUEOUS SOLUTIONS OF ALKALI METAL HALIDES
F. M. Shagieva, L. B. Boinovich
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow
Keywords: aqueous solutions of potassium halides, dispersion of refractive indices, specific ion effect, dynamic dielectric permittivity, effective polarizability
Abstract
Dispersions of the refractive index are measured in aqueous solutions of potassium halides at different salt concentrations and temperatures of the solutions. The specific effect of anions on the dynamic dielectric permittivity of the solutions is found. A model is proposed to evaluate the character of changes in the dynamic dielectric permittivity of the solutions and effective dynamic polarizabilities of ions in the solutions based on the data about the dispersion of refractive indices. The role of ion sizes and the character of their interaction with a solvent in the manifestation of specific ion effects are discussed.
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