TY - JOUR ID - 5865 TI - Measurement and Modeling of Mean Ionic Activity Coefficient in Aqueous Solution Containing NaNO3 and Poly Ethylene Glycol JO - Iranian Journal of Chemistry and Chemical Engineering JA - IJCCE LA - en SN - 1021-9986 AU - Modarresi, Siamak AU - Dehghani, Mohammad Reza AU - Alimardani, Parinaz AU - Kazemi Sabzvar, Sara AU - Feyzi, Farzaneh AD - Chemical Engineering Department, Iran University of Science and Technology, Tehran, I.R. IRAN Y1 - 2013 PY - 2013 VL - 32 IS - 2 SP - 31 EP - 39 KW - Activity Coefficient KW - Polymer KW - Electrolyte Solution KW - Ion-selective electrode DO - 10.30492/ijcce.2013.5865 N2 - 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.  UR - https://ijcce.ac.ir/article_5865.html L1 - https://ijcce.ac.ir/article_5865_e2fbb73d0a550f376e0950dabf913a1f.pdf ER -