Dielectric properties of aqueous electrolytic solutions

Abstract

Measurements have been made of the microwave dielectric constants and losses of some aqueous solutions at 28°C over a concentration range from 0.25 M to saturation. From these results, the values of the static dielectric constant and relaxation time for these solutions have been calculated on the basis of the Cole-Cole formula which appears to hold accurately. All salts show a lowering of the dielectric constant and a shift in the relaxation time of water. The minimum hydration numbers of the four positive ions are estimated.