Acoustical behaviour of glycerine, dextrose and sucrose in Na₂CO₃ and NaHCO₃ buffer solution

Abstract

The ultrasonic velocity, density and viscosity of glycerine, dextrose and sucrose in sodium carbonate (0.5 M) + sodium bicarbonate (0.5 M) buffer solutions at temperatures 303, 308 and 313 K have been measured. The derived acoustical and thermodynamic parameters namely, adiabatic compressibility, free length, specific acoustic impedance, free volume, internal pressure, molar cohesive energy, viscous relaxation time, Gibb’s free energy, relative association, available volume, molal hydration number and Lennard Jones potential have been calculated. The variations of these parameters with respect to the molarity and elevation of temperature have been explained on the basis of solute-solvent interaction and structure forming tendency of the solutes in the solvents.