INVESTIGATION OF DENSITY, VISCOSITY, AND EXCESS THERMODYNAMIC PARAMETERS IN TERNARY SYSTEMS COMPRISING ONE MOLAL AQUEOUS ALKALI METAL SALT, 18 CROWN 6 ETHER, AND 1 CMC SURFACTANT.

Abstract

The effect of surfactant and temperature on the Complexation of 18-crown-6 with aqueous alkali metal ion. The viscosities and densities of aqueous solution of RbBr with various Concentrations of 18-crown-6 with one CMC Surfactant (1-Decyl Trimethyl Ammonium Bromide) have been measured at 298.15K and 308.15K. The experimental data obtained were used to calculate the excess volume (VE) and Viscosity deviation (∆η). These results are interpreted in terms of interaction and Complexation Rb+ ion with Cavities of 18-Crown-6 in presence and absence of Surfactant. Water is the high polarity solvent therefore Rb+ ion has more solvation. In presence of surfactant reduce the ability of complexation. Generally at higher temperature hydration of Rb+ ion with water decreases and enhances the Complexation between 18-crown-6 with Rb+ ion.