Ultrasonic Investigations of Lactose in Aqueous Solution of Tetraalkylammonium Bromide Salts at 303.15, 308.15 and 313.15K

Densities (ρ) and Ultrasonic velocity (U) for different molal concentration of lactose in aqueous solutions of tetra alkylammonium bromide salts in 0.0M, 0.05M and 0.1M at various temperature (303.15, 308.15 and 313.15 K) were measured at atmospheric pressure. From these experimental results, different derived parameters such as adiabatic compressibility (β), change in adiabatic compressibility (Δβ), relative change in adiabatic compressibility (Δβ/β0), relative association (Ra) and acoustic impedance (Z) have been calculated. The results are interpreted in terms of solute-solvent and solute-solute interactions in these systems. It has been observed that there exist strong solute-solvent interactions in these systems, which increase with increase in lactose concentration as well as with tetra alkylammonium bromide salts.