Volumetric Properties of Cyclic Alanylalanine in Aqueous Solutions of MnCl₂, NiCl₂ and ZnCl₂ at Temperatures T = (293.15 to 313.15) K
Pages 48-62
V.R. Karanth and D. Krishna Bhat

DOI: http://dx.doi.org/10.6000/1929-5030.2015.04.01.4

Published: 25 Feburary 2015

Abstract: The partial molar volumes, isentropic compressibilities, partial molar isentropic compressions and transfer molar quantities of cyclic alanylalanine in water and in aqueous solutions of MnCl₂, NiCl₂ and ZnCl₂ were determined using the experimental density and speed of sound values. Refractive indices of all the solutions were recorded to calculate the molar refractions. The molecular interactions existing in the systems have been discussed based on the derived parameters. It has been found that M²⁺-O₂H bond distances of hydrated cations influence on the volumetric properties of cyclic alanylalanine. Further, the greater effect of hydrophobic hydration has been substantiated by the S_v values of least square fits of apparent molar volume against solute molality.