Abstract
The densities of dilute aqueous solutions of the isomers of butylammonium chlorides (n-, iso-, sec-, andtert-BuNH3Cl) and sodium butanecarboxylates (n-, iso-, sec-, andtert-BuCOONa) have been determined at 5, 25, and 45°C using a buoyancy technique. The limiting partial molal volumes\(\bar V^\circ\) and expansibilities of the solutes have been evaluated. The branching of alkyl chain causes larger\(\bar V^\circ\) values for BuNH3Cl series but smaller values for BuCOONa series. The\(\bar V^\circ\) values of branched isomers have been calculated using the data for volume increment accompanying methyl substitution. Good agreement with the experimental values was obtained. It is suggested that the volumetric behavior of the organic electrolytes studied is governed by the influences of the ionic groups on the hydrophobic hydration. The results have been compared with the data for butanol isomers.
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Sakurai, M., Komatsu, T. & Nakagawa, T. Apparent molal volumes of butylammonium chlorides and sodium butanecarboxylates in dilute aqueous solutions. J Solution Chem 4, 511–522 (1975). https://doi.org/10.1007/BF00650689
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DOI: https://doi.org/10.1007/BF00650689