Activity coefficients of LiCl in (PEG 4000 + water) at T = (288.15, 298.15, and 308.15) K

Jaime W. Morales, Héctor R. Galleguillos, Teófilo A. Graber, Felipe Hernández-Luis

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

22 Citas (Scopus)

Resumen

The electromotive force of the cell containing two ion-selective electrodes (ISE),Na-ISE | LiCl (m), PEG 4000 (w), H2 O (1 - w) | Cl-ISEhas been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the mass fraction of PEG 4000 (w) in the mixture. w was varied between 0 and 0.25 in 0.05-unit steps and the molality of the electrolyte (m) was between c.a. (0.03 and 5.8) mol · kg-1. The values of the standard electromotive force, E{ring operator}, were determined using routine methods of extrapolation, together with extended Debye-Hückel and Pitzer equations. The results obtained produced good internal consistency for all the temperatures studied. Once E{ring operator} was determined, the mean ionic activity coefficients for LiCl, the Gibbs free energy of transfer from the water to (PEG 4000 + water), and the primary LiCl hydration number were calculated.

Idioma originalInglés
Páginas (desde-hasta)1255-1260
Número de páginas6
PublicaciónJournal of Chemical Thermodynamics
Volumen42
N.º10
DOI
EstadoPublicada - oct. 2010
Publicado de forma externa

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