Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K
Samo za registrovane korisnike
2013
Autori
Popović, DanielaMiladinović, Jelena
Miladinović, Zoran P.
Grujić, Snežana
Todorović, Milica D.
Rard, Joseph A.
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
The molality-based osmotic coefficients of aqueous mixtures of KBr and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic method at KBr ionic strength fractions y = (0.18328, 0.38241, 0.58031, 0.79186, and 1) and over the ionic strength range (2.5452 to 10.0418) mol . kg (-1), using KCl(aq) and CaCl2(aq) as the reference standard solutions. These experiments were performed using glass sample dishes because preliminary experiments showed that some corrosion of our usual gold-plated silver dishes occurred with dissolution of silver, presumably by "pinhole" corrosion at imperfections in the gold layer. These osmotic coefficients were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual Pitzer 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 are no previously published isopiestic measurements for this ternary s...ystem. The present assessment yields mixing parameters for these models. Model parameters for KBr(aq) at T = (298.15 +/- 0.01) K were also evaluated using the present results along with four sets of osmotic coefficients taken from the published literature. For the {yKBr + (1 -y)K2HPO4}(aq) system, the model with five Scatchard mixing terms gave a significantly better representation of the osmotic coefficients than any of the other models and is therefore recommended for calculation of osmotic and activity coefficients.
Ključne reči:
Aqueous solutions / Isopiestic measurements / KBr / K2HPO4 / Osmotic coefficients / Activity coefficientsIzvor:
Journal of Chemical Thermodynamics, 2013, 62, 151-161Izdavač:
- Academic Press Ltd- Elsevier Science Ltd, London
Finansiranje / projekti:
- Novi industrijski i ekološki aspekti primene hemijske termodinamike na unapređenje hemijskih procesa sa višefaznim i višekomponentnim sistemima (RS-MESTD-Basic Research (BR or ON)-172063)
DOI: 10.1016/j.jct.2013.03.003
ISSN: 0021-9614
WoS: 000318612000019
Scopus: 2-s2.0-84876140946
Kolekcije
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Popović, Daniela AU - Miladinović, Jelena AU - Miladinović, Zoran P. AU - Grujić, Snežana AU - Todorović, Milica D. AU - Rard, Joseph A. PY - 2013 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2532 AB - The molality-based osmotic coefficients of aqueous mixtures of KBr and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic method at KBr ionic strength fractions y = (0.18328, 0.38241, 0.58031, 0.79186, and 1) and over the ionic strength range (2.5452 to 10.0418) mol . kg (-1), using KCl(aq) and CaCl2(aq) as the reference standard solutions. These experiments were performed using glass sample dishes because preliminary experiments showed that some corrosion of our usual gold-plated silver dishes occurred with dissolution of silver, presumably by "pinhole" corrosion at imperfections in the gold layer. These osmotic coefficients were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual Pitzer 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 are no previously published isopiestic measurements for this ternary system. The present assessment yields mixing parameters for these models. Model parameters for KBr(aq) at T = (298.15 +/- 0.01) K were also evaluated using the present results along with four sets of osmotic coefficients taken from the published literature. For the {yKBr + (1 -y)K2HPO4}(aq) system, the model with five Scatchard mixing terms gave a significantly better representation of the osmotic coefficients than any of the other models and is therefore recommended for calculation of osmotic and activity coefficients. PB - Academic Press Ltd- Elsevier Science Ltd, London T2 - Journal of Chemical Thermodynamics T1 - Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K EP - 161 SP - 151 VL - 62 DO - 10.1016/j.jct.2013.03.003 ER -
@article{ author = "Popović, Daniela and Miladinović, Jelena and Miladinović, Zoran P. and Grujić, Snežana and Todorović, Milica D. and Rard, Joseph A.", year = "2013", abstract = "The molality-based osmotic coefficients of aqueous mixtures of KBr and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic method at KBr ionic strength fractions y = (0.18328, 0.38241, 0.58031, 0.79186, and 1) and over the ionic strength range (2.5452 to 10.0418) mol . kg (-1), using KCl(aq) and CaCl2(aq) as the reference standard solutions. These experiments were performed using glass sample dishes because preliminary experiments showed that some corrosion of our usual gold-plated silver dishes occurred with dissolution of silver, presumably by "pinhole" corrosion at imperfections in the gold layer. These osmotic coefficients were modeled with an extended form of Pitzer's ion-interaction model equations, both with the usual Pitzer 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 are no previously published isopiestic measurements for this ternary system. The present assessment yields mixing parameters for these models. Model parameters for KBr(aq) at T = (298.15 +/- 0.01) K were also evaluated using the present results along with four sets of osmotic coefficients taken from the published literature. For the {yKBr + (1 -y)K2HPO4}(aq) system, the model with five Scatchard mixing terms gave a significantly better representation of the osmotic coefficients than any of the other models and is therefore recommended for calculation of osmotic and activity coefficients.", publisher = "Academic Press Ltd- Elsevier Science Ltd, London", journal = "Journal of Chemical Thermodynamics", title = "Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K", pages = "161-151", volume = "62", doi = "10.1016/j.jct.2013.03.003" }
Popović, D., Miladinović, J., Miladinović, Z. P., Grujić, S., Todorović, M. D.,& Rard, J. A.. (2013). Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K. in Journal of Chemical Thermodynamics Academic Press Ltd- Elsevier Science Ltd, London., 62, 151-161. https://doi.org/10.1016/j.jct.2013.03.003
Popović D, Miladinović J, Miladinović ZP, Grujić S, Todorović MD, Rard JA. Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K. in Journal of Chemical Thermodynamics. 2013;62:151-161. doi:10.1016/j.jct.2013.03.003 .
Popović, Daniela, Miladinović, Jelena, Miladinović, Zoran P., Grujić, Snežana, Todorović, Milica D., Rard, Joseph A., "Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K" in Journal of Chemical Thermodynamics, 62 (2013):151-161, https://doi.org/10.1016/j.jct.2013.03.003 . .