Volumetric Studies of Copper Sulphate in Aqueous L -Valine System at Different Temperatures

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2019 Volume 19 page no:1-8

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 (f °), slopes (S ) and partial molar volumes of transfer (𝑉^°  ). The

                                   v                                                                                                                               2,𝑡𝑟

v

2,𝑡𝑟

2,𝑡𝑟

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 (f °), slopes and these results were utilised for the calculation of partial molar volume of transfer (𝑉^° .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 (𝑉^° ) values in L-Valine solutions indicate hydrophobic-hydrophobic and ionic-hydrophobic interaction is more pronounced in L-Valine system

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