Ultrasonic wave propagation in liquid has been the subjects of exhaustive research which has been carried out
theoretically and practically. There are many approaches and spectroscopic techniques used to determine the structure-function
relation of molecules. All these methods are very useful in studying the structures of the compound as well as physicochemical
characters. Among the techniques used, ultrasonic velocity measurements through liquid medium gain much more importance
in assessing the nature of molecular interactions. In the present investigation, experimental and theoretical study is carried out
about the results of ultrasonic velocity (v), density (ρ) and viscosity (η), surface tension (σ) along with estimated parameters like
hydration number, apparent molar volume (Φv) for the ternary liquid mixture of sodium salt of 4-amino, 2-hydroxy benzoic acid
in 50% ethanol at 0.1M, 0.01M and 0.001M concentration range. The temperatures at which the study is carried out are
298.15K, 303.15K and 308.15
