Water activities,osmotic and activity coefficients in aqueous chloride solutions atT = 298.15 K by the hygrometric method |
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| Institution: | 1. MINES ParisTech, PSL Research University, Centre de Géosciences, 35 rue Saint-Honoré 77305 Fontainebleau – France;2. MINES ParisTech, PSL Research University, Centre Thermodynamique des Procédés, 35 rue Saint-Honoré 77305 Fontainebleau – France;3. Université de Lorraine, GéoRessources UMR CNRS 7359, BP 70239 Faculté des Sciences et Technologie 54506 Vandoeuvre-lès-Nancy – France;4. Université de Lorraine, LRGP-ENSIC UMR CNRS 7274, BP 20451 1 rue Granville 54001 Nancy – France;5. Université Blaise Pascal Clermont-Ferrand 2, ICCF UMR CNRS/UBP 6296, 24 avenue des Landais 63177 Aubière – France;6. Université de Pau et des Pays de l’Adour, ENSGTI LaTEP EA 1932, BP 7511 rue Jules Ferry 64075 Pau –France;7. IFP Energies Nouvelles, 1 et 4 avenue de Bois-PRéau 92852 Rueil-Malmaison – France;8. BRGM, 3 avenue Claude Guillemin BP 36009 45060 Orléans cedex 2 – France;9. TOTAL, CSTJF, avenue Larribau F-64018 Pau – France;1. CRC for Greenhouse Gas Technologies (CO2CRC), Department of Chemical and Biomolecular Engineering, The University of Melbourne, Parkville, Vic. 3010 Australia;2. Institute for Frontier Materials, Deakin University, Pigdons road, Waurn Ponds, Vic. 3216 Australia;1. Department of Chemical Engineering, Indian Institute of Technology, Hyderabad, India;2. Department of Chemical Engineering, University of Calcutta, Calcutta, India;1. Department of Chemistry, Shahid Beheshti University, Evin-Tehran 1983963113, Iran;2. Department of Chemistry, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran |
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| Abstract: | Water activities of aqueous electrolyte solutions of HCl(aq), LiCl(aq), NaCl(aq), KCl(aq), CsCl(aq), NH4Cl(aq), MgCl2(aq), CaCl2(aq), and BaCl2(aq) have been determined at T = 298.15 K by the hygrometric method, and at molalities ranging from 0.2 mol · kg − 1to saturation. From measurements of droplets diameters of reference NaCl(aq) or LiCl(aq), the dependence of relative humidity on solute concentration was determined. The data on the relative humidities allow the deduction of water activities and the osmotic coefficients at different molalities. Osmotic coefficient data have been described by the ion interaction model of Pitzer. The ion interaction parameters were also determined for each of the studied salts. With these parameters, the solute activity coefficients can be predicted. Our present results have been compared with reported thermodynamic data. |
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