Ultrasonic velocities, densities and viscosities have been measured for (1M Alanine + 1M NaCl) and (1M Alanine + 1M MgCl2) at different temperatures. Ultrasonic velocity of mixture has been measured with single crystal interferometer. Using these experimental data, the derived thermo acoustical parameters such as adiabatic compressibility (βa); acoustic impedance (Z); intermolecular free length (Lf); relative association (RA) has been calculated. By using experimental as well as derived parameters data, excess thermo acoustical parameters i.e. Excess adiabatic compressibility (βa E); excess acoustic impedance (ZE); excess intermolecular free length (Lf E) and excess relative association (RA E) have been computed. Results have been analyzed with the variations in thermodynamic parameters as well as excess thermo acoustical parameters with concentrations of solutes and at different temperatures. Both thermodynamic and excess thermodynamic parameters threw some light on the molecular interactions among the liquid mixtures of electrolyte solutions and aqueous amino acid.
