Acoustic, Rheological and Optical Properties of Binary Mixtures of Aqueous Solutions of PEG 200—A Comparative Analysis

Abstract

Prediction of density, viscosity, ultrasonic velocity and refractive indices of binary liquid mixtures is essential for the determination of composition of binary liquid mixtures. Ultrasonic velocity and refractive index measurements in combination with density, viscosity, boiling point, melting point and other analytical data are very useful industrially also for common substances which include oils, waxes, sugar syrups, etc. In the present study, it is planned to compute the density, viscosity, ultrasonic velocity and refractive index of binary liquid mixtures of polyethylene glycol (Molar mass: 200) (PEG 200) with water at different molar concentrations (0.0009, 0.0027, 0.0045, 0.0063, 0.0080, 0.0098, 0.0116, 0.0133, 0.0151 and 0.0168), at 303 K. The experimental values of viscosity, ultrasound velocity and refractive index are compared with various theoretical models. The most reliable method that matches with experimental method is identified by calculating average percentage error (APE).