Ultrasonic Study of Acoustical Parameters of Dextran Solution with 1(N) NaOH at Different Temperatures and Concentrations

The ultrasonic studies in solutions are great use in understanding the nature and strength of molecular interaction. The thermo-physical parameters like density, ultrasonic velocity and viscosity have been measured for dextran solution with NaOH at 303K, 308K, 313K, 318K and 323K at 9MHz frequency in different concentration of dextran solution. Using the experimental values of density, viscosity and ultrasonic velocity some of the acoustical parameters such as, acoustic impedance, adiabatic compressibility, intermolecular free length, relaxation time, Gibb's free energy have been calculated at constant frequency. The behavior of these parameters with composition of the solution has been discussed in terms of molecular interaction between the solute-solvent interaction and packing effects of solutes with solvent molecules.