Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K
Samo za registrovane korisnike
2019
Autori
Ivanović, TijanaPopović, Daniela
Miladinović, Jelena
Rard, Joseph A.
Miladinović, Zoran P.
Belošević, Svetlana
Trivunac, Katarina
Članak u časopisu (Objavljena verzija)
Metapodaci
Prikaz svih podataka o dokumentuApstrakt
Isopiestic measurements have been made for aqueous mixtures of NaH2PO4 and KH2PO4 at T=(298.15 +/- 0.01) K, at NaH2PO4 ionic strength fractions y=(0, 0.19108, 0.38306, 0.58192, and 1), assuming that both electrolytes dissociate as 1:1 electrolytes, using KCl(aq) as the reference standard solution. Model parameters for an extended form of Pitzer's ion-interaction model and also for the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale were evaluated at T=298.15K for NaH2PO4(aq) using the present isopiestic results (13 values), as were those for KH2PO4(aq) using the present isopiestic results (12 values), together with numerous critically-assessed osmotic coefficients for both electrolytes taken from the published literature. The thermodynamic models for KH2PO4(aq) extend to m=2.187molkg(-1), which is slightly above saturation, while those for NaH2PO4(aq) extend to m=7.5molkg(-1), which is below saturation. The 39 osmotic coefficients for the ternary mixtur...es from the present study along with 42 values from a published study were likewise represented with these models, with both the usual Pitzer mixing terms and also Scatchard's neutral-electrolyte model mixing terms being used for the extended ion-interaction model. Two mixing parameters were needed for each of the models, and all three models gave similar quality representations of the experimental results. Maximum differences in calculated values of mean molality-based activity coefficients for these three models are (+/-)(NaH2PO4)0.0080 and (+/-)(KH2PO4)0.0043. The experimental results were also found to nearly conform to Zdanovskii's rule.
Ključne reči:
Aqueous solutions / Isopiestic measurements / NaH2PO4 / KH2PO4 / Osmotic coefficients / Activity coefficientsIzvor:
Journal of Solution Chemistry, 2019, 48, 3, 296-328Izdavač:
- Springer/Plenum Publishers, New York
Finansiranje / projekti:
DOI: 10.1007/s10953-018-0839-4
ISSN: 0095-9782
WoS: 000462984100003
Scopus: 2-s2.0-85057604777
Kolekcije
Institucija/grupa
Tehnološko-metalurški fakultetTY - JOUR AU - Ivanović, Tijana AU - Popović, Daniela AU - Miladinović, Jelena AU - Rard, Joseph A. AU - Miladinović, Zoran P. AU - Belošević, Svetlana AU - Trivunac, Katarina PY - 2019 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4174 AB - Isopiestic measurements have been made for aqueous mixtures of NaH2PO4 and KH2PO4 at T=(298.15 +/- 0.01) K, at NaH2PO4 ionic strength fractions y=(0, 0.19108, 0.38306, 0.58192, and 1), assuming that both electrolytes dissociate as 1:1 electrolytes, using KCl(aq) as the reference standard solution. Model parameters for an extended form of Pitzer's ion-interaction model and also for the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale were evaluated at T=298.15K for NaH2PO4(aq) using the present isopiestic results (13 values), as were those for KH2PO4(aq) using the present isopiestic results (12 values), together with numerous critically-assessed osmotic coefficients for both electrolytes taken from the published literature. The thermodynamic models for KH2PO4(aq) extend to m=2.187molkg(-1), which is slightly above saturation, while those for NaH2PO4(aq) extend to m=7.5molkg(-1), which is below saturation. The 39 osmotic coefficients for the ternary mixtures from the present study along with 42 values from a published study were likewise represented with these models, with both the usual Pitzer mixing terms and also Scatchard's neutral-electrolyte model mixing terms being used for the extended ion-interaction model. Two mixing parameters were needed for each of the models, and all three models gave similar quality representations of the experimental results. Maximum differences in calculated values of mean molality-based activity coefficients for these three models are (+/-)(NaH2PO4)0.0080 and (+/-)(KH2PO4)0.0043. The experimental results were also found to nearly conform to Zdanovskii's rule. PB - Springer/Plenum Publishers, New York T2 - Journal of Solution Chemistry T1 - Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K EP - 328 IS - 3 SP - 296 VL - 48 DO - 10.1007/s10953-018-0839-4 ER -
@article{ author = "Ivanović, Tijana and Popović, Daniela and Miladinović, Jelena and Rard, Joseph A. and Miladinović, Zoran P. and Belošević, Svetlana and Trivunac, Katarina", year = "2019", abstract = "Isopiestic measurements have been made for aqueous mixtures of NaH2PO4 and KH2PO4 at T=(298.15 +/- 0.01) K, at NaH2PO4 ionic strength fractions y=(0, 0.19108, 0.38306, 0.58192, and 1), assuming that both electrolytes dissociate as 1:1 electrolytes, using KCl(aq) as the reference standard solution. Model parameters for an extended form of Pitzer's ion-interaction model and also for the Clegg-Pitzer-Brimblecombe equations based on the mole-fraction-composition scale were evaluated at T=298.15K for NaH2PO4(aq) using the present isopiestic results (13 values), as were those for KH2PO4(aq) using the present isopiestic results (12 values), together with numerous critically-assessed osmotic coefficients for both electrolytes taken from the published literature. The thermodynamic models for KH2PO4(aq) extend to m=2.187molkg(-1), which is slightly above saturation, while those for NaH2PO4(aq) extend to m=7.5molkg(-1), which is below saturation. The 39 osmotic coefficients for the ternary mixtures from the present study along with 42 values from a published study were likewise represented with these models, with both the usual Pitzer mixing terms and also Scatchard's neutral-electrolyte model mixing terms being used for the extended ion-interaction model. Two mixing parameters were needed for each of the models, and all three models gave similar quality representations of the experimental results. Maximum differences in calculated values of mean molality-based activity coefficients for these three models are (+/-)(NaH2PO4)0.0080 and (+/-)(KH2PO4)0.0043. The experimental results were also found to nearly conform to Zdanovskii's rule.", publisher = "Springer/Plenum Publishers, New York", journal = "Journal of Solution Chemistry", title = "Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K", pages = "328-296", number = "3", volume = "48", doi = "10.1007/s10953-018-0839-4" }
Ivanović, T., Popović, D., Miladinović, J., Rard, J. A., Miladinović, Z. P., Belošević, S.,& Trivunac, K.. (2019). Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K. in Journal of Solution Chemistry Springer/Plenum Publishers, New York., 48(3), 296-328. https://doi.org/10.1007/s10953-018-0839-4
Ivanović T, Popović D, Miladinović J, Rard JA, Miladinović ZP, Belošević S, Trivunac K. Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K. in Journal of Solution Chemistry. 2019;48(3):296-328. doi:10.1007/s10953-018-0839-4 .
Ivanović, Tijana, Popović, Daniela, Miladinović, Jelena, Rard, Joseph A., Miladinović, Zoran P., Belošević, Svetlana, Trivunac, Katarina, "Isopiestic Determination of the Osmotic and Activity Coefficients of the {yNaH(2)PO(4)+(1-y)KH2PO4}(aq) System at T=298.15K" in Journal of Solution Chemistry, 48, no. 3 (2019):296-328, https://doi.org/10.1007/s10953-018-0839-4 . .