TY - JOUR
T1 - Activity coefficients of LiCl in (PEG 4000 + water) at T = (288.15, 298.15, and 308.15) K
AU - Morales, Jaime W.
AU - Galleguillos, Héctor R.
AU - Graber, Teófilo A.
AU - Hernández-Luis, Felipe
N1 - Funding Information:
The authors thank CONICYT-Chile for the support provided through Fondecyt Project No. 1070909 and the International Relations Office (ORI) of the Universidad de La Laguna for its collaboration that made the stay of J.W.M. possible. We also thank the Vice-Rectory of Research and Technological Development of the Universidad de La Laguna for the support provided through its Support Finance for Maintaining Consolidated Research Groups (No. 1802440702). J.W.M. also thanks the Post-graduate Scholarship Program of Advanced Human Capital of CONICYT-Chile.
PY - 2010/10
Y1 - 2010/10
N2 - 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.
AB - 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.
KW - Activity coefficient
KW - Ion-selective electrode (ISE)
KW - LiCl
KW - PEG 4000
KW - emf
UR - http://www.scopus.com/inward/record.url?scp=77953869269&partnerID=8YFLogxK
U2 - 10.1016/j.jct.2010.05.001
DO - 10.1016/j.jct.2010.05.001
M3 - Article
AN - SCOPUS:77953869269
SN - 0021-9614
VL - 42
SP - 1255
EP - 1260
JO - Journal of Chemical Thermodynamics
JF - Journal of Chemical Thermodynamics
IS - 10
ER -