Activity coefficients of NaNO3 in poly(ethylene glycol) 4000 + water mixtures at (288.15, 298.15, and 308.15) K

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

doi:10.1021/je1002835

Activity coefficients of NaNO₃ in poly(ethylene glycol) 4000 + water mixtures at (288.15, 298.15, and 308.15) K

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

Research output: Contribution to journal › Article › peer-review

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Abstract

The potential difference of the cell containing two ion-selective electrodes (ISE), Na-ISE|NaNO₃(m), PEG 4000(w), H₂O(1 - w)|NO₃-ISE, has been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the mass fraction w of poly(ethylene glycol) 4000 (PEG 4000) in a mixed solvent. w was varied between 0 and 0.25 in 0.05-unit steps, and the molality of the electrolyte (m) was between (0.004 and 5.800) mol·kg^-1, approximately. The values of the standard potential difference, E⁰, 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 E⁰ was determined, the mean ionic activity coefficients for NaNO₃ were calculated.

Original language	English
Pages (from-to)	4082-4087
Number of pages	6
Journal	Journal of Chemical and Engineering Data
Volume	55
Issue number	9
DOIs	https://doi.org/10.1021/je1002835
State	Published - 9 Sep 2010
Externally published	Yes

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title = "Activity coefficients of NaNO3 in poly(ethylene glycol) 4000 + water mixtures at (288.15, 298.15, and 308.15) K",

abstract = "The potential difference of the cell containing two ion-selective electrodes (ISE), Na-ISE|NaNO3(m), PEG 4000(w), H2O(1 - w)|NO3-ISE, has been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the mass fraction w of poly(ethylene glycol) 4000 (PEG 4000) in a mixed solvent. w was varied between 0 and 0.25 in 0.05-unit steps, and the molality of the electrolyte (m) was between (0.004 and 5.800) mol·kg-1, approximately. The values of the standard potential difference, E0, were determined using routine methods of extrapolation, together with extended Debye-H{\"u}ckel and Pitzer equations. The results obtained produced good internal consistency for all the temperatures studied. Once E0 was determined, the mean ionic activity coefficients for NaNO3 were calculated.",

author = "Felipe Hern{\'a}ndez-Luis and Morales, {Jaime W.} and Graber, {Te{\'o}filo A.} and Galleguillos, {H{\'e}ctor R.}",

year = "2010",

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doi = "10.1021/je1002835",

language = "English",

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T1 - Activity coefficients of NaNO3 in poly(ethylene glycol) 4000 + water mixtures at (288.15, 298.15, and 308.15) K

AU - Hernández-Luis, Felipe

AU - Morales, Jaime W.

AU - Graber, Teófilo A.

AU - Galleguillos, Héctor R.

PY - 2010/9/9

Y1 - 2010/9/9

N2 - The potential difference of the cell containing two ion-selective electrodes (ISE), Na-ISE|NaNO3(m), PEG 4000(w), H2O(1 - w)|NO3-ISE, has been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the mass fraction w of poly(ethylene glycol) 4000 (PEG 4000) in a mixed solvent. w was varied between 0 and 0.25 in 0.05-unit steps, and the molality of the electrolyte (m) was between (0.004 and 5.800) mol·kg-1, approximately. The values of the standard potential difference, E0, 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 E0 was determined, the mean ionic activity coefficients for NaNO3 were calculated.

AB - The potential difference of the cell containing two ion-selective electrodes (ISE), Na-ISE|NaNO3(m), PEG 4000(w), H2O(1 - w)|NO3-ISE, has been measured at temperatures of (288.15, 298.15, and 308.15) K as a function of the mass fraction w of poly(ethylene glycol) 4000 (PEG 4000) in a mixed solvent. w was varied between 0 and 0.25 in 0.05-unit steps, and the molality of the electrolyte (m) was between (0.004 and 5.800) mol·kg-1, approximately. The values of the standard potential difference, E0, 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 E0 was determined, the mean ionic activity coefficients for NaNO3 were calculated.

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IS - 9

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Activity coefficients of NaNO₃ in poly(ethylene glycol) 4000 + water mixtures at (288.15, 298.15, and 308.15) K

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