Study of the Volumetric Properties of the Aqueous Ionic Liquid 1-Methyl-3-pentylimidazolium Tetrafluoroborate |
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| Authors: | Jia-Zhen Yang Jing Tong Jing-Bin Li |
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| Affiliation: | (1) Department of Chemistry, Liaoning University, Shenyang, 110036, People’s Republic of China;(2) The Institute of Salt Lakes, Chinese Academy of Science, Xining, 810008, People’s Republic of China;(3) The Graduate school, of the Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China |
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| Abstract: | This paper reports the densities of aqueous solutions of the ionic liquid (IL) 1-methyl-3-pentylimidazolium tetrafluoroborate ([pmim][BF4]) that were measured from 278.15 to 343.15 K, at intervals of 5 K, using an Anton Parr model DMA 4500 oscillating U-tube densitometer. The apparent molar volume, φ V B, and the partial molar volume of [pmim][BF4],  , were calculated. The values of the apparent molar volume, φ V B, were fitted to Pitzer’s model for volumetric properties by the method of least-squares, which allowed the partial molar volume of the IL at infinite dilution,  , and Pitzer’s parameters, β M,X (0)V and β M,X (1)V , to be obtained. The small standard deviations of the fits show that Pitzer’s model is also appropriate for representing the volumetric properties of aqueous solutions of the ionic liquid [pmim][BF4]. |
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| Keywords: | Volumetric properties Ionic liquid [pmim][BF4] Pitzer’ s equation |
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