Effect of physical properties on conductivity measurements of acetyl acetonylbinylidine 4-aminosalycilic acid in different percentages of ethanol-water mixture

Abstract EN

The effect of physical properties on solute solvent interaction were studied by conductivity measurements of acetylacetonylbinylidine 4-aminosalycilic acid in different percentages of ethanolwater (5,10, 15, 20, 25% of ethanol) at 298.15K using Lee-Wheaton equation of conductivity.

The results show that the association constant (KA) increase with increasing ethanol percentages and viscosity and decreasing dielectric constant of the solvent and the distance of ion in solution (R).

On the other hand, the equivalent conductance at infinite dilution (Λo) increases with increasing ethanol percentages due to the decreasing of the distance between ions in solution (R), which means that ion pairs convert from solvent separated ion (SSIP) to contact ion pairs (CIP) at best fit value of σΛ.