Activity Coefficients of NaCl in Aqueous Mixtures with High Relative Permittivity Cosolvent: Ethylene Carbonate + Water at 298.15 K

摘要: The mean ionic activity coefficients of NaCl were experimentally determined in ethylene carbonate (EC) + water at 298.15 K from potential difference measurements the following electrochemical cell containing two ion-selective electrodes (ISEs): Na-ISE|NaCl(m),EC(w),H2O(1−w)|Cl-ISE molality (m) varied between 0.02 mol·kg−1 and almost saturation, while mass fraction EC mixture (w) was 0 0.8 0.1 unit steps. Values standard difference, E0 (molal scale), using a routine method extrapolation together with extended Debye−Huckel, Pitzer, Scatchard equations. results obtained produced good internal consistency, within normal limits experimental error encountered these types measurement. Once determined, NaCl, Gibbs energy transfer to mixture, solubility product water, primary ...