Ultrasonic investigation of molecular interaction of L-Valine in mixed aqueous systems at different temperatures

V. A. Giratkar¹*, R. B. Lanjewar² and S. M. Gadegone^3
1Department of Chemistry, Sardar Patel College, Chandrapur, Maharastra, India
²Department of Chemistry, M.P. Deo Memorial Science College, Nagpur, Maharastra, India
³Department of Chemistry, Kamla Nehru College, Nagpur, Maharastra, India

A B S T R A C T
The ultrasonic velocity (u), density (ρ) and viscosity (η) of L-Valine solutions (0.02-0.12 mol.dm-3) in 2% of NaI solutions have been investigated at 288.15, 293.15, 298.15 and 303.15K respectively. The acoustic parameters such as adiabatic compressibility (β), free length (Lf), acoustic impedance (Z), free volume (Vf) and relative association (RA) have been calculated. The variations of acoustic parameters with concentration and temperature indicated the existence of intermolecular interaction in the present systems.
Keywords: Ultrasonic velocity, compressibility, acoustic impedance, L-Valine