Solvent extraction of sodium from water into nitrobenzene by using strontium dicarbollylcobaltate in the presence of benzo-15-crown-5 |
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| Authors: | E. Makrlík P. Vaňura |
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| Affiliation: | (1) Faculty of Applied Sciences, University of West Bohemia, Husova 11, 306 14 Pilsen, Czech Republic;(2) Prague Institute of Chemical Technology, Technická 5, 166 28 Prague 6, Czech Republic |
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| Abstract: | Summary From extraction experiments andg-activity measurements, the extraction constant corresponding to the 2Na+(aq)+SrL(nb)?2NaL+(nb)+Sr2+(aq) equilibrium taking place in the two-phase water-nitrobenzene system (L=benzo-15-crown-5; aq=aqueous phase, nb=nitrobenzene phase) was evaluated as log Kex(2Na+,SrL)=1.0±0.1. Further, the stability constant of the benzo-15-crown-5-sodium complex in nitrobenzene saturated with water was calculated for a temperature of 25 °C: log bnb(NaL+)=7.8±0.1. |
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