Abstract
The densities of 1,3-butanediol-water mixtures and some tetraalkylammonium iodide salt solutions in these solvent mixtures at different concentrations (0.02 M-0.14 M) have been determined at 298.15 K using magnetic float densitometer technique. Then apparent molar volumes ΦVof the electrolytes in above solvent mixtures were calculated. The apparent molar volumes of transfer ∆ΦV° (tr) were also calculated and the ion-ion / ion- solvent interactions are then discussed on the basis of changes in the Masson's slope and apparent molar volumes of transfer data.
Highlights
The knowledge of apparent molar and partial molar volumes of electrolyte has been utilized to study ion-ion and ion-solvent interactions in aqueous and non-aqueous solvents of different dielectric constant by a number of scientists[1,2,3,4,5,6]
The negative slope was explained by Frank on the basis of his hypothesis according to which the water structure is enforced around the alkyl chains of the R4N+ ions
We have examined the behaviour of different tetra alkyl ammonium iodide salts in 1,5pentanediol- water mixtures in our earlier communication[15]
Summary
The knowledge of apparent molar and partial molar volumes of electrolyte has been utilized to study ion-ion and ion-solvent interactions in aqueous and non-aqueous solvents of different dielectric constant by a number of scientists[1,2,3,4,5,6]. The ФV0 determined by ФV values have been utilized to estimate apparent molar volumes of transfer at infinite dilution, ∆ФV0 (tr) for various tetraalkylammonium iodide salts from water to aqueous solutions of 1,3- butanediol.
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