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Limiting Partial Molar Volume of Sodium Chloride in 2-Methyl-2,4-pentandiol-Water Mixed Solvents at 25 °C

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Abstract

Herein we report density measurements for the binary system 2-methyl-2,4-pentanediol(MPD,1)-water(0), and for the ternary system MPD(1)-NaCl(2)-water(0), at several fixed MPD/water ratios and at varying NaCl concentrations. The partial molar volume of MPD in the binary system has been discussed according to the McMillan-Meyer theory. At low MPD concentrations, the non-bonding MPD-MPD interactions are related to the overlapping of the hydrophobic parts of the hydration cospheres, whereas at higher concentrations the hydrophilic moieties are also involved in the solute-solute interactions. The ternary density data allowed us to determine the salt partial molar volume at infinite dilution. The trend of this quantity as a function of the MPD content in the MPD-water “mixed solvent” has been interpreted on the basis of the water partial molar volume in the binary MPD-water system.

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Authors and Affiliations

  1. Chemistry Department, University “Federico II” of Naples, Complesso di Monte Sant’Angelo, Via Cinthia, 80126, Naples, Italy

    F. Capuano, G. Mangiapia, G. D’Errico & R. Sartorio

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  1. F. Capuano
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  2. G. Mangiapia
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  3. G. D’Errico
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  4. R. Sartorio
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Correspondence to R. Sartorio.

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Capuano, F., Mangiapia, G., D’Errico, G. et al. Limiting Partial Molar Volume of Sodium Chloride in 2-Methyl-2,4-pentandiol-Water Mixed Solvents at 25 °C. J Solution Chem 35, 1525–1535 (2006). https://doi.org/10.1007/s10953-006-9077-2

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  • DOI: https://doi.org/10.1007/s10953-006-9077-2

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