Table of Contents
ISRN Chemical Engineering
Volume 2012, Article ID 730154, 5 pages
Research Article

New Data on Activity Coefficients of Potassium, Nitrate, and Chloride Ions in Aqueous Solutions of KNO3 and KCl by Ion Selective Electrodes

Reprocessing R & D Division, RPG, IGCAR, Kalpakkam 603102, India

Received 14 October 2012; Accepted 7 November 2012

Academic Editors: S. Rodríguez-Couto and C. Xu

Copyright © 2012 Debasmita Dash et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Ion selective electrodes (ISEs) are used to measure the single-ion activity coefficients in aqueous solutions of KNO3 and KCl at 298.15 K against a double-junction reference electrode. The EMF responses of ISEs up to 0.01 m are plotted to obtain the slope and intercept values. The obtained slopes and intercepts are used in Nernst equation for higher concentrated solutions for calculation of individual ion activity coefficient. The mean ionic activity coefficients are estimated from single ion activity coefficient, and the obtained results are compared with the literature values.