Stability Constant of the EuCl2+ Complex in Several Ionic Strength Media |
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| Authors: | M Jiménez-Reyes M Solache-Ríos A Rojas-Hernández |
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| Institution: | (1) Departamento de Química, Instituto Nacional de Investigaciones Nucleares, Apdo. Postal, 18-1027, 11801 México, D.F., México;(2) Departamento de Química, Área de Quimica Analítican, Universidad Autónoma Metropolitana-Iztapalapa, Apdo, Postal, 55-534, Av. Michoacán y La Purísima, Col. Vicentina, 09340 México, D.F., México |
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| Abstract: | The stability constant of the EuCl2 + complex was determined in perchloric acid media at 0.2, 0.5, and 1.0 M ionic strength by means of a solvent extraction method with dinonyl naphthalene sulfonic acid at 30°C. The values for  1,Cl were: 2.1 ± 0.1, 1.45 ± 0.01, and 0.84 ± 0.07, respectively, for each of the media. The Brønsted–Guggenheim–Scatchard specific ion interaction theory (SIT) was applied to these data and to some literature data to calculate a 1,Cl of 23.9 at infinite dilution. The calculated specific ion interaction coefficient  for the pair EuCl2 +, ClO4
– was 0.52. Species-distribution diagrams have been analyzed. |
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| Keywords: | Europium chloride stability constant solvent extraction perchloric acid media ionic strength SIT |
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