Solute-Solvent Interactions Of Glycine With Urea (aq)+KBr (aq) at 298, 308 And 318K

Abstract

The principal function of glycine is as a precursor to proteins. It is also a building block to numerous natural products. The measurements of density, viscosity and sound speed have been determined by experimental procedures using bicapillary pyknometer, Ostwald’s viscometer and Ultrasonic interferometer respectively. The experimental data related to density, viscosity, sound speed for the system as Glycine+Urea(aq)+KBr(aq) are further utilized to derive parameters viz. adiabatic compressibility(β), apparent molal volume(Φv), apparent molal compressibility(Φk), Intermolecular free length(Lf), Specific acoustic impedance(Z), internal pressure(Πi), Solvation number(Sn), relative association(RA), ultrasonic attenuation(α/f2). From these derived parameters we calculate limiting apparent molal volume(Ñ„v°), limiting apparent molal compressibility(Ñ„k°) and experimental slope(Sv* and Sk* ) by using Masson’s equation. The viscosity data are analyzed using Jones-Dole equation. The concentration range selected for Glycine is 0.10m to 1.2m. The measurements are conducted at three temperatures viz. 298, 308, 318K. The constancy of temperature is maintained by the use of refrigerated bath with water as circulating medium. The results are interpreted on the basis of solute-solvent and solute-solute interactions where the addition of solute and its concentration produces a major discrepancy on the interactions which evinces that interactions are a function of the concentration.