Abstract
Pitzer ion-interaction model and electromotive force (emf) data of a galvanic cell without liquid junction were used for the determination of activity coefficients of NH 4Cl in different ethanol–water mixed solvents at 25 °C. The used galvanic cell is schematically represented by: Ag∣AgCl∣NH 4Cl (m), H 2O (100-w%), EtOH (w%)∣NH 4 + (ISE), in which ISE stands for ion-selective electrode and w for the mass fraction percent of ethanol. The mixed ethanol–water systems contained, respectively, 0, 10, 20, 30, 40, and 50 mass fraction percent EtOH. The experimental emf data were obtained using a solvent polymeric PVC ammonium selective membrane electrode containing a mixture of nonactin/monactin as ionophore and an Ag/AgCl electrode. Activity coefficients were determined over the molality range from dilute solution to near salt saturation (i.e., about 5.38 mol/kg in pure water or 2 mol/kg in 50% mixed EtOH–water solvent).
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
