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Water is designated as “Universal solvent” due to its physical and chemical attributes. Water becomes attracted to different types of molecules due to the polar arrangement of oxygen and hydrogen atoms having partial negative and positive charges. The density (ρ), ultrasonic velocity (U), viscosity (η) and refractive index (nD) of the aqueous solutions of 1, 2-ethanediol / 1, 2, 3-propanetriol have been determined at three different temperatures. Derived properties such molar volume (V), isentropic compressibility (βs), acoustic impedance (Z) and free length (Lf) have been calculated using density, ultrasonic velocity and refractive index values at the measured temperatures. To evaluate various, inter and intra-molecular associations present in the systems, the excess properties (V, βs, Z, Lf , η and ∆nD) are estimated. The excess values obtained experimentally have been fitted to the Redlich -Kister polynomial equation. Multiple linear regression and mixing rules have been adopted to calculate the viscosity and refractive index for the aqueous solutions at 298.15, 308.15 and 318.15K.

biointerface research in applied chemistry

Experimental and Theoretical Insights to Physicochemical Properties of Aqueous Solutions of 1, 2-Ethanediol and 1, 2, 3-Propanetriol at Different Temperatures