Density and activity of pertechnetic acid aqueous solutions at T = 298.15 K |
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| Affiliation: | 1. CEA, Nuclear Energy Division, Radiochemistry & Processes Department, F-30207 Bagnols sur Cèze, France;2. Institut de Chimie Séparative de Marcoule, Université de Montpellier 2, UMR 5257 CEA/CNRS/UM2/ENSCM, BP 17171, 30207 Bagnols sur Cèze Cedex, France;1. Radioanalytical chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085, India;2. Homi Bhabha National Institute, Anushaktinagar, Mumbai 400094, India;1. Department of Analytical Chemistry, Chemical Faculty, Gdańsk University of Technology (GUT), 11/12G. Narutowicza St., 80-233 Gdańsk, Poland;2. Faculty of Chemistry and Pharmacy, University of Sofia “St. Kl. Okhridski”, 1, J. Bourchier Blvd., 1164 Sofia, Bulgaria;3. Université de Toulouse, INP, ENSIACET, 4 allée Emile Monso, CS 44362, 31030 Toulouse Cedex 4, France;1. Department of Petrochemical Technology, Anna University, BIT Campus, Tiruchirappalli 620024, India;2. Department of Physics and Nanotechnology, SRM University, Kattankulathur 603203, India;3. Quantum-Functional Semiconductor Research Center, Dongguk University, Seoul, Republic of Korea;1. State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;2. School of Chemistry and Chemical Engineering, Nantong University, Nantong 226007, China;1. Univ. Ibn Zohr, Faculté de Sciences, BP 8106, Cité Dakhla, Agadir, Equipe de Catalyse et Environnement, Morocco;2. Univ. Chouaib Doukkali, Faculté de Sciences, BP 20, M-24000, El Jadida, Laboratoire de Catalyse et de Corrosion des Matériaux, Morocco;3. Univ. Lille Nord de France, ENSCL, BP 90108, F-59652, Villeneuve d''Ascq Cedex, Unité Matériaux et Transformations-Ingénierie des systèmes polymères, CNRS UMR 8207, France;4. Univ. Hassan 1, Laboratoire de Chimie et Modélisation Mathématique, 25 000, Khouribga, Morocco;5. Univ. Chouaib Doukkali, Faculté de Sciences, Laboratoire de Chimie Organique Bioorganique et Environnement, Morocco |
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| Abstract: | The previous isopiestic investigations of HTcO4 aqueous solutions at T = 298.15 K are believed to be unreliable, because of the formation of a ternary mixture at high molality. Consequently, published isopiestic molalities for aqueous HTcO4 solutions at T = 298.15 K were completed and corrected. Binary data (variation of the osmotic coefficient and activity coefficient of the electrolyte in solution in the water) at T = 298.15 K for pertechnetic acid HTcO4 were determined by direct water activity measurements. These measurements extend from molality m = 1.4 mol · kg−1 to m = 8.32 mol · kg−1. The variation of the osmotic coefficient of this acid in water is represented mathematically. Density variations at T = 298.15 K are also established and used to express the activity coefficient values on both the molar and molal concentration scale. The density law leads to the partial molar volume variations for aqueous HTcO4 solutions at T = 298.15 K, which are compared with published data. |
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| Keywords: | Pertechnetic acid Binary data Activity coefficient Osmotic coefficient Water activity |
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