Effect of hydrolysis on the diffusion of ferric sulphate in aqueous solutions at T = 298.15 K |
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| Institution: | 1. Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal;2. Departamento de Química Física, Facultad de Farmacia, Universidad de Alcalá, 28871 Alcalá de Henares, Madrid, Spain;1. Department of Chemistry, King Abdul-Aziz University, Jeddah, Saudi Arabia;2. EXPEC ARC Research Center, Saudi Aramco, Dhahran, Saudi Arabia;1. University of Oxford, Department of Earth Sciences, South Parks Road, Oxford OX1 3AN, United Kingdom;2. Woods Hole Oceanographic Institution, Department of Marine Chemistry and Geochemistry, Woods Hole, MA 02543, United States;3. UPMC Université Paris 06, UMR 7193 ISTeP, 4 Place Jussieu, 75005 Paris, France;4. CNRS, UMR CNRS 7193 ISTeP, 4 Place Jussieu, 75005 Paris, France;1. Jiangsu University of Science and Technology, Jiangsu, Zhenjiang 212000, China;2. Zhangjiagang Smartgrid Fanghua Electrical Energy Storage Research Institute, Jiangsu, Zhangjiagang 215600, China |
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| Abstract: | Diffusion coefficients of the Fe2(SO4)3)/water system at T = 298.15 K and at concentrations between 0.050 mol · dm−3 and 0.200 mol · dm−3 have been measured, using a conductimetric cell and an automatic apparatus to follow diffusion. The cell uses an open-ended capillary method. A conductimetric technique is used to follow the diffusion process by measuring the resistance of a solution inside the capillaries at recorded times. These data are discussed on the basis of the Onsager–Fuoss model. The diffusion of Fe2(SO4)3 is clearly affected by the Fe (III) hydrolysis. These data permit us to have a better understanding of the structure of such systems and the thermodynamic behaviour of ferric sulphate in different media. |
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