The osmotic coefficients of aqueous mixtures of KCl and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic vapor pressure method over the range of ionic strengths from (2.3700 to 11.250) mol . kg(-1) using CaCl2(aq) as the reference solution. Our new experimental results were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual mixing terms and with Scatchard's neutral-electrolyte mixing terms, and with the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale. There is a dearth of previously published isopiestic data for mixtures containing salts of HPO42- (aq) and, consequently, no previous measurements are available for comparison with the present results. The present study yields Cl--HPO42- mixing parameters for these three models that are needed for modeling the thermodynamic activities of solute components of natural waters and other complex aqueous electrolyte mixtures.
TY - JOUR
AU - Popović, Daniela
AU - Miladinović, Jelena
AU - Todorović, Milica D.
AU - Zrilić, Milorad
AU - Rard, Joseph A.
PY - 2011
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/1872
AB - The osmotic coefficients of aqueous mixtures of KCl and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic vapor pressure method over the range of ionic strengths from (2.3700 to 11.250) mol . kg(-1) using CaCl2(aq) as the reference solution. Our new experimental results were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual mixing terms and with Scatchard's neutral-electrolyte mixing terms, and with the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale. There is a dearth of previously published isopiestic data for mixtures containing salts of HPO42- (aq) and, consequently, no previous measurements are available for comparison with the present results. The present study yields Cl--HPO42- mixing parameters for these three models that are needed for modeling the thermodynamic activities of solute components of natural waters and other complex aqueous electrolyte mixtures.
PB - Academic Press Ltd- Elsevier Science Ltd, London
T2 - Journal of Chemical Thermodynamics
T1 - Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K
EP - 1885
IS - 12
SP - 1877
VL - 43
DO - 10.1016/j.jct.2011.06.017
ER -
@article{
author = "Popović, Daniela and Miladinović, Jelena and Todorović, Milica D. and Zrilić, Milorad and Rard, Joseph A.",
year = "2011",
abstract = "The osmotic coefficients of aqueous mixtures of KCl and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic vapor pressure method over the range of ionic strengths from (2.3700 to 11.250) mol . kg(-1) using CaCl2(aq) as the reference solution. Our new experimental results were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual mixing terms and with Scatchard's neutral-electrolyte mixing terms, and with the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale. There is a dearth of previously published isopiestic data for mixtures containing salts of HPO42- (aq) and, consequently, no previous measurements are available for comparison with the present results. The present study yields Cl--HPO42- mixing parameters for these three models that are needed for modeling the thermodynamic activities of solute components of natural waters and other complex aqueous electrolyte mixtures.",
publisher = "Academic Press Ltd- Elsevier Science Ltd, London",
journal = "Journal of Chemical Thermodynamics",
title = "Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K",
pages = "1885-1877",
number = "12",
volume = "43",
doi = "10.1016/j.jct.2011.06.017"
}
Popović, D., Miladinović, J., Todorović, M. D., Zrilić, M.,& Rard, J. A.. (2011). Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K. in Journal of Chemical Thermodynamics
Academic Press Ltd- Elsevier Science Ltd, London., 43(12), 1877-1885.
https://doi.org/10.1016/j.jct.2011.06.017
Popović D, Miladinović J, Todorović MD, Zrilić M, Rard JA. Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K. in Journal of Chemical Thermodynamics. 2011;43(12):1877-1885.
doi:10.1016/j.jct.2011.06.017 .
Popović, Daniela, Miladinović, Jelena, Todorović, Milica D., Zrilić, Milorad, Rard, Joseph A., "Isopiestic determination of the osmotic and activity coefficients of the {yKCl + (1-y)K2HPO4}(aq) system at T=298.15 K" in Journal of Chemical Thermodynamics, 43, no. 12 (2011):1877-1885,
https://doi.org/10.1016/j.jct.2011.06.017 . .
