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Densities, viscosities and ultrasonic velocities of an amino acid L-Serine at four diffe rent temperatures 288.15, 293.15, 298.15 and 303.15K for various concentrations (0.02 to 0.12) mol dm−3 in 2% of aqueous electrolytic solution have been measured. These measurements have been used to evaluate some important thermo-acoustic parameters such as Rao’s constant (R), Wada’s constant (W), molecular radius (ro), absorption coefficient (a/f2) and relaxation strength. The results are interpreted in terms of molecular inte ractions between the components of the mixture.

ULTRASONIC STUDIES OF AMINO ACID IN AQUEOUS SALT SOLUTION AT DIFFERENT TEMPERATURES