Activity Coefficients of Cesium Chloride and Cesium Sulfate in Aqueous Mixtures Using an Electromotive Force Method at 298.15 K

Abstract

Activity coefficients for the CsCl + Cs 2 SO 4 + H 2 O ternary system were determined at 298.15 K by electromotive force (EMF) measurements of the cell: Cs ion-selective electrode (ISE)|CsCl(m A ), Cs 2 SO 4 (m B ), H 2 O|Ag|AgCl. The cesium ion-selective electrode (Cs-ISE) and the Ag|AgCl electrode used in this work were made in this laboratory and had a good Nernst response. The experimental data were interpreted using Harned's rule and the Pitzer model. The corresponding parameters required in the Pitzer model have been evaluated for this system. Osmotic coefficients of this system and activity coefficients of the second salt Cs 2 SO 4 were also calculated in the same molality range.

Activity Coefficients of RbF or CsF in the Ethene Glycol + Water System by Potentiometric Measurements at 298.15 K

“…As a continuation of our previous investigations in the field of the thermodynamic properties of rare alkali metal salts in mixture systems (RbCl or CsCl + methanol/ethanol + water, CsCl + Cs 2 SO 4 + H 2 O, and CsCl + MgCl 2 + H 2 O), − in this work, we determined the mean activity coefficients of RbF or CsF in the ethene glycol + water system by potentiometric measurements at 298.15 K. The mass fraction of ethene glycol is from 0.10 to 0.40. The Pitzer model was applied to describe the behavior of the system.…”

Thermodynamic study of the mixed system (CsCl+CaCl2+H2O) by EMF Measurements at T=298.15K

“…The values of excess Gibbs free energies (G E ), and activities of water (a w ) were determined for all series of investigated mixedelectrolyte solutions using equations (10) and (11).…”

“…The ternary system of the present study (CsCl + CaCl 2 + H 2 O) is one part of our series work dealing with the thermodynamic properties of rubidium and cesium salts [8][9][10]. As we known, the system (CsCl + CaCl 2 + H 2 O) was not studied in previous papers.…”

Thermodynamic Study of the NaNO3–Cd(NO3)2–H2O Ternary System at 298.15 K by the Potential Difference Method

“…The CoCl 2 –CoSO 4 –H 2 O system has been determined by Pournaghdy et al Cs and Ca salts were thermodynamically investigated by Hu et al, − and the activity coefficients of the NaCl–Na 2 SO 4 –H 2 O , and KI–KNO 3 –H 2 O systems were also studied by researchers.…”