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Keywords
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Acivity Coefficients,Thermodynamics solvation, Gibss free energy of transfer, Hydration, Conductivity, NaCl and Galactose
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Abstract
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Study of aqueous solutions is one of the important subject of studies about metabolic processes of organisms and research about their salvation is considered in thermodynamics of biochemistry. Activity coefficient and conductivity for NaCl in Galactose+ water mixed solvent were determined at 298.15 K by electromotive force (emf) measurements. Electrochemical cells with a sodium ion selective electrode (Na–ISE) versus a chloride ion selective electrode (Cl–ISE) as a reference electrode were used to determine the activity coefficients for NaCl– monosaccharide (D-galactose) systems in water at 298.15 K. A comparison of the results with references shown that agreement is excellent. The Gibbs free energy parameters of the interactions between this sugar and NaCl in water were evaluated together with the parameter C1(CHOH, exo) , indicating the interaction of the exocyclic CHOH group of saccharide molecules and NaCl. The results suggested that the interactions of these monosaccharides with NaCl are controlled mostly by the dominant conformer of their molecules in water
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