Trisodium EDTA in Aqueous Glycol Mixtures at Different Temperatures: A Volumetric and Ultrasonic Investigation

Polyethylene glycols 200 and 400 were subjected to four separate temperature measurements for density and sound speed in a trisodium EDTA/water combination. According to this information, the following quantities were determined: limiting apparent molar volumes (ϕV0), apparent specific volume (vϕ), isobaric molar thermal expansion (α), isentropic compressibility (ks), and limiting partial molar isentropic compression (ϕK,s0). In order to comprehend the molecular interactions and structural differentiation occurring within the mixture, the variations in these physicochemical characteristics were examined as functions of concentrations as well as temperatures. In mixes with a high water content, the hydrophobic hydration process of glycols that were investigated became apparent. Additionally, it was also determined how much the –CH2– and –O– groups contributed to the system’s volume and acoustic characteristics. These contributions are applicable to a broad variety of data as the computed values using the group contribution technique were in strong alignment during the observed data. The combination has been the subject of FTIR spectroscopy studies, which reveal the intermolecular forces and the presence of hydrogen bonds within the ternary system.