%0 Journal Article %T Measurement and Modeling of Mean Ionic Activity Coefficient in Aqueous Solution Containing NaNO3 and Poly Ethylene Glycol %J Iranian Journal of Chemistry and Chemical Engineering %I Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR %Z 1021-9986 %A Modarresi, Siamak %A Dehghani, Mohammad Reza %A Alimardani, Parinaz %A Kazemi Sabzvar, Sara %A Feyzi, Farzaneh %D 2013 %\ 06/01/2013 %V 32 %N 2 %P 31-39 %! Measurement and Modeling of Mean Ionic Activity Coefficient in Aqueous Solution Containing NaNO3 and Poly Ethylene Glycol %K Activity Coefficient %K Polymer %K Electrolyte Solution %K Ion-selective electrode %R 10.30492/ijcce.2013.5865 %X Potentiometric investigation on {H2O+NaNO3+PEG1500} mixtures were made at T=308.15K, using electrochemical cells with two ion-selective electrodes, (Na+ glass) as the cation ion-selective electrode against (NO3- solvent-polymer PVC) as the anion ion-selective electrode. The mean ionic activity coefficients of NaNO3 were measured at different concentrations of  NaNO3 and PEG. Maximum concentration of electrolyte and PEG were 1 mol/kg and 0.12 mol/kg, respectively. The experimental data was modeled by utilizing the modified Pitzer equation and the activity coefficient ratio of PEG was evaluated by using Maxwell’s cross differential relation.  %U https://ijcce.ac.ir/article_5865_e2fbb73d0a550f376e0950dabf913a1f.pdf