Association constants of cadmium ion and chloride ion in concentrated aqueous solutions of ammonium nitrate |
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| Affiliation: | 1. College of Chemistry, Chemical and Environmental Engineering, Henan University of Technology, Lianhua Street 100, 450001 Zhengzhou, China;2. Environment Research Institute, Shandong University, Shanda South Road 27, 250100 Jinan, China;1. School of Biosciences, University of Nottingham Sutton Bonington Campus, Loughborough LE12 5RD, United Kingdom;2. British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom |
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| Abstract: | Activity coefficients of cadmium nitrate and ammonium chloride were measured potentiometrically in a solvent consisting of 2 moles of water per mole of ammonium nitrate at 39·9°. Thermodynamic consistency was demonstrated for data obtained with silver-silver chloride electrodes and with cadmium (amalgam) electrodes. Association constants for the formation of CdCl+, CdCl2 and Cd2Cl3+ were, in (moles/mole NH4NO3)−, 340 ± 20, 75 ± 5 and 5 ± 5 respectively. The concentration dependence of the activity coefficients was compared with calculations based on a quasi-lattice model of molten salt solutions. |
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