Water activity,osmotic and activity coefficients of aqueous solutions of Li2SO4, Na2SO4, K2SO4, (NH4)2SO4, MgSO4, MnSO4, NiSO4, CuSO4, and ZnSO4 at T=298.15 K |
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| Institution: | 1. Departamento de Química, Facultad de Ciencias Naturales, Matemática y del Medio Ambiente, Universidad Tecnológica Metropolitana, Santiago, Chile;2. Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Santiago, Chile;3. Carrera de Ingeniería Química, Facultad Nacional de Ingeniería, Universidad Técnica de Oruro, Bolivia;4. Departamento de Ingeniería Química y Procesos de Minerales, Universidad de Antofagasta, Av. Angamos 601, Antofagasta, Chile;5. Department of Chemical Engineering, University of Santiago de Chile (USACH), Avenida Libertador Bernardo O''Higgins 3363, Estación Central, Santiago, Chile;6. Universidad de Santiago de Chile, Departamento de Ingeniería Eléctrica, Avenida Ecuador N. 3519, Estación Central, Chile. |
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| Abstract: | The water activities for aqueous solutions of Li2SO4(aq), Na2SO4(aq), K2SO4(aq), (NH4)2SO4(aq), and sulphates MgSO4(aq), MnSO4(aq), NiSO4(aq), CuSO4(aq), and ZnSO4(aq) were determined experimentally at a temperature of 298.15 K with a hygrometric method, at molalities in the range from 0.1 mol·kg−1 to saturation. The osmotic coefficients are calculated from these results. The coefficients of Pitzer’s model was used to fit the osmotic coefficients for each salt solution. These parameters were used to predict solute activity coefficients for the salts studied. |
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