Activity coefficients for NaF in methanol-water and ethanol-water mixtures at 25°C

Activity coefficients of NaF in (glucose+water) and (sucrose+water) mixtures at 298.15 K

“…E * is the apparent standard potential (molal scale) of the cell and contains the potential of asymmetry of both selective electrodes [14][15][16]. In this study, these asymmetry potentials were always small and independent of the solvent composition.…”

“…In other mixtures such as (methanol + water) and (ethanol + water) [15], it was verified that a < q, producing a strong ionic association which increased with the molar fraction of the co-disolvent. Also, for the (water + ethylene carbonate) mixture [34] where a 6 q, a slight increase is observed in the ionic association with increase in the presence of EC.…”

“…The temperature was kept constant at 298.15 for all the studies. These studies were carried out using potentiometric techniques which have advanced markedly in recent decades due mainly to the development and improvement of new ion-selective electrodes (ISEs) [13][14][15][16][17][18][19][20][21]. Now, these electrodes are not only valuable for analytical use, but also may be employed in determining thermodynamic and transport magnitudes.…”

Activity coefficients of rubidium chloride and cesium chloride in methanol–water mixtures and a comparative study of Pitzer and Pitzer–Simonson–Clegg models (298.15K)

“…It was obvious that the decrease in ln γ ± with the increase in m, and decrease of ln γ ± for a given m value with the increasing mass fraction percents of the methanol in used systems. These profiles were observed in the similar systems, such as NaF in methanol-water and ethanol-water [15]. To explain such situations, we took ion-ion and ion-solvent interactions into consideration.…”

“…Actually, in many previous works, people have used such a model to calculate the activity coefficients of NH 4 Cl in different mixed Table 1 Electromotive force, E, and the mean activity coefficients, γ ± , at the different RbCl molality and weight percent of methanol in methanol-water systems at 298. 15 ethanol-water [4] and 1-propanol-water [5] systems at 25 • C; NaCl in methanol-water [6]; furthermore, Hernández-Luis et al [7,8], Zhang et al [9,10], Zhuo et al [11] were also do well in the similar studies.…”