Dielectric properties of saturated solutions of the Ba(HCOO)(2)-Cu(HCOO)(2)-H2O system

The complex permittivity and electrical conductivity of saturated solutions of the Ba(HCOO)(2)-Cu(HCOO)(2)-H2O ternary system of water with salts was studied in the microwave range at frequencies of 13, 16, 19.25, and 25 GHz at 298 K, The static permittivity epsilon (s) and the dielectric relaxation time tau of the solutions were determined. The concentration curves of the dielectric parameters of the saturated solutions reflect the features of t he trend of solubility isotherms and singular points of the ternary welter- salt system. Over the concentration range of crystallization of Ba2Cu(HCOO) (6) . 4H(2)O, the permittivity conserves a practically constant value, whic h renders this concentration range distinguishable with regard to intermole cular interactions. From additivity analysis of the contributions made by t he binary systems to epsilon (s) variation in the saturated ternary solutio ns, complexing was shown to exist in concentrated ternary salt solutions. B oth hydration and ion-ion association affect the permittivity and govern th e trend of the solubility isotherm for the system in question.