Density, Speed of Sound, and Refractive Index of Aqueous Binary Mixtures of Some Glycol Ethers at T = 298.15 K

The experimental data of densities (ρ), speeds of sound (u), and refractive indices (nD) of aqueous solutions of different glycol ethers, namely, ethylene glycol iso-propyl ether (EGIPE), ethylene glycol monobutyl ether (EGMBE), diethylene glycol dimethyl ether (DEGDME), diethylene glycol monobutyl ether (DEGMBE), propylene glycol monomethyl ether (PGMME), and dipropylene glycol monomethyl ether (DPGMME), over the entire composition range, at temperature T = 298.15 K, and at one atmospheric pressure have been obtained. The derived parameters such as the apparent molar volume (ϕV) of solute, isentropic compressibility of solution (βS), apparent molar isentropic compressibility (ϕKS) of solute, excess molar volume (VE) of solution, molar refraction ([R]1,2), deviation in refractive index (ΔnD) of solutions, deviation in molar refraction (Δ[R]1,2), and the deviation in isentropic compressibility (ΔβS) have been computed. The limiting apparent molar volumes of solutes (ϕV0), limiting apparent molar isentropic compressibilities of solutes (ϕKS0), and the limiting excess partial molar volumes of solutes (V̅20E) have also been obtained. The results are interpreted in terms of hydrogen bonding, solute−solute, and solute−solvent interactions.