Ultrasonic and volumetric investigation of aqueous disodium EDTA with PEG 400 and PEG 4000 at different temperatures

Abstract Polyethylene glycol (PEG) 400 and 4000 thermodynamic characteristics in water-based disodium ethylenediaminetetraacetic acid solutions provide important clues about the nature of the intermolecular interactions taking place in this liquid environment. In order to make these determinations, the present study reports data for density and sound velocity at a variety of temperatures and then analyses the volumetric-acoustic features of the solutions. The experimental data for PEG 400 and PEG 4000, which are polyethylene glycols, were recorded at a constant atmospheric pressure of 0.1 MPa and at temperatures ranging from 288.15 to 318.15 K. The values were 0.007, 0.008, and 0.009 mol·kg −1 . From the experimental density and speed of sound values, the following are computed: apparent molar properties, partial molar properties, partial molar transfer properties, and the partial molar expansibility, along with its first derivative and thermal expansion coefficient. According to the co-sphere overlap model, the results are described using these generated parameters, these are thought of as the type of interactions taking place within the combination. This study also uses partial molar characteristics to assess the pair interaction coefficients and triplet interaction coefficients.