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Determination of transference numbers of NaBr in mixtures of H 2O EtOH at 298.15K

YAO Jia,YAN Wei dong,XIE Xue peng,HAN Shi jun(Dept. of Chemistry,Zhejiang Univ.,Hangzhou 310027,China)  
A set of equipment was established for determining the transference numbers of electrolyte solutions by EMF method.The measured transference number and limiting ionic conductance values in NaBr H 2O and NaBr MeOH systems at 298.15K were compared with the literature values,the results show that the equipment is reliable. Transference numbers of NaBr in mixtures of water with ethanol have been measured at 298.15K. The limiting ionic conductance(λ 0),Walden product(λ 0η)and solvated numbers(n) for Na + and Br - in various solvent systems have been estimated.The ionic solvated behavior and the micro properties for ion solvent and solvent solvent in various solvent systems were analyzed and discussed.
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