Acoustical and thermodynamical properties of lactose in mixed aqueous electrolytic solutions at 298.15K 

By R. Palani, S. Balakrishnan and S. Ramya 

ABSTRACT

Ultrasonic velocity (U), viscosity (h) and density (?) of lactose of (0.5m) in three aqueous electrolytic solutions of guanidine hydrochloride (GuHCl), barium chloride (BaCl2) and strontium chloride (Sr Cl2) have been measured at 298.15 K. The derived acoustical parameters namely adiabatic compressibility (b), apparent molal compressibility (Your browser may not support display of this image. ), apparent molal volume (Your browser may not support display of this image. ), limiting apparent molal compressibility (Your browser may not support display of this image. ), limiting apparent molal volume (Your browser may not support display of this image. ), and their constant (SK, SV), viscosity B–coefficient and hydration number (nH) have been computed from the experimental data. The variation of these parameters with respect the molality of solute has been discussed in terms of solute-solvent and solute-co-solute interactions. 

Keywords:  Ultrasonic velocity, adiabatic compressibility, hydration number, apparent molal compressibility, apparent molal volume.

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