کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
158285 457002 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Activities of aqueous Na+Na+ and Cl-Cl- ions from homoionic measurements with null junction potentials at different concentrations
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Activities of aqueous Na+Na+ and Cl-Cl- ions from homoionic measurements with null junction potentials at different concentrations
چکیده انگلیسی

Individual Na+Na+ and Cl-Cl- ionic activity coefficients were measured in aqueous solutions of NaCl at 298.15 K in a homoionic system. The emf of sodium and chloride half-cell ion-selective electrodes (ISEs) was measured against a single junction reference electrode of Ag/AgCl, filled with NaCl solutions. Experimental runs were performed at concentrations 0.5, 1.0, 1.5, 2.0, 2.5 and 3.0 m of the filling solution. In each run, the concentration of the sample solution was increased from around 1×10-3m, up to the corresponding molality of the filling solution. Thus, the last point of each run had a zero liquid-junction potential. The ionic activity coefficients measured in this work were found to be independent of the molal concentration of the filling solution used and in good agreement with previous results obtained using heteroionic systems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 62, Issue 14, July 2007, Pages 3849–3857
نویسندگان
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