Volumetric Studies of Copper Sulphate in Aqueous L -Valine System at Different Temperatures
Volumetric Studies of Copper Sulphate in Aqueous L -Valine System at Different Temperatures
Dr.Monika Singh1, Dr.Kalpana Shahi2,
1+2 Teacher, K.B Sahay Senior Secondary School, Patna
2 Dept. of Chemistry, College Of Commerce Arts & Science , Patna, Patliputra University
ABSTRACT Densities (ρ) of copper sulphate in water and in binary aqueous mixtures of L-Valine for different molar concentration (0.05mol kg-1 & 0.1mol kg-1) have been measured at different temperatures (305K, 315K, 325K and 335K). These data have been used to calculate apparent molar volume (fv), limiting apparent molar volume (fv°), slopes (Sv) and partial molar volumes of transfer (
) . The data have been analysed using the Masson equation. Graphical plot of apparent molar volumes( fv ) verus √c at different temperatures gave the values of limiting apparent molar volume (fv°), slopes and these results were utilised for the calculation of partial molar volume of transfer () .The negative or positive values of obtained parameters have been used to discuss in terms of ion-ion and ion–solvent interactions occurring in solutions. The trends of transfer volumes have been interpreted in terms of solute-co solute interactions on the basis of a co-sphere overlap model. The negative partial molar volumes of transfer () values in L-Valine solutions indicate hydrophobic-hydrophobic and ionic-hydrophobic interaction is more pronounced in L-Valine system.