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Densities and molar volumes of aqueous solutions of LiClO4 at temperatures from 293 K to 343 K
Journal article   Peer reviewed

Densities and molar volumes of aqueous solutions of LiClO4 at temperatures from 293 K to 343 K

B. Hua, L. Hnědkovský, W. Li and G. Hefter
Journal of Chemical & Engineering Data, Vol.61(4), pp.1388-1394
2016
DOI: https://doi.org/10.1021/acs.jced.5b00535
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Abstract

Densities of aqueous solutions of purified lithium perchlorate at solute concentrations ranging from approximately 0.05 to 5 mol·kg-1 have been measured by vibrating-tube densimetry at 5 K intervals over the temperature range 293 ≤ T/K ≤ 343 at atmospheric pressure. Apparent molar volumes of LiClO4(aq) derived from these data varied smoothly with solute concentration and temperature and could be fitted with an average precision of ±0.02 cm3·mol-1 using an extended Redlich-Rosenfeld-Meyer equation. The present results show that volumetric data listed in popular literature compilations are inaccurate. The effects of temperature on the partial molar volumes of LiClO4(aq) are nonlinear and indicate that the structure-breaking or -making character of this salt depends on concentration and temperature. Systematic differences observed between the volumes of lithium and sodium salts with a common anion appear to be related to differences in the strength of hydration of the two cations.

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Domestic collaboration
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Citation topics
2 Chemistry
2.89 Ionic, Molecular & Complex Liquids
2.89.462 Excess Molar Volumes
Web Of Science research areas
Chemistry, Multidisciplinary
Engineering, Chemical
Thermodynamics
ESI research areas
Chemistry
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