Studies of volumetric and acoustic properties of trisodium citrate and tripotassium citrate in aqueous solutions of N-acetyl glycine at different temperatures

Densities, ρ, and speed of sound, u for trisodium citrate and tripotassium citrate in (0.085 and 0.18) mol · kg−1 aqueous solutions of N-acetyl glycine at T = (288.15, 293.15, 298.15, and 303.15) K have been measured. The different parameters such as apparent molar volume, limiting apparent molar volume, transfer volume, partial molar expansibility have been derived from density data. Experimental values of the speed of sound were used to estimate apparent molar adiabatic compressibility, limiting apparent molar adiabatic compressibility, and transfer parameter. The pair and triplet interaction coefficient have been calculated from transfer parameters. These parameters have been discussed in the light of ion–ion and ion–solvent interactions.

► Densities and speeds of sound of citrate salts in aqueous N-acetyl glycine.
► Partial molar volumes and compressibility of transfer.
► Partial molar expansibility is calculated.
► Transfer volume data have been used to calculate the pair and triplet interactions.
► Solute–solute and solute–solvent interactions.