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dc.creatorPopović, Daniela
dc.creatorMiladinović, Jelena
dc.creatorMiladinović, Zoran P.
dc.creatorIvošević, Branislav
dc.creatorTodorović, Milica D.
dc.creatorRard, Joseph A.
dc.date.accessioned2021-03-10T11:49:18Z
dc.date.available2021-03-10T11:49:18Z
dc.date.issued2012
dc.identifier.issn0021-9614
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2112
dc.description.abstractThe osmotic coefficients of aqueous mixtures of KNO3 and K2HPO4 have been measured at T = (298.15 +/- 0.01) K by the isopiestic vapor pressure method at KNO3 ionic strength fractions y = (0.20581, 0.43631, 0.61099, and 0.83170), over the ionic strength range (2.4958 to 6.0801) mol.kg (1), using KCl(aq) and CaCl2(aq) as the reference standard solutions. These measurements include some new isopiestic results for the KNO3(aq) binary system extending slightly into the oversaturated (supersaturated) molality region from (2.1973 to 4.1295) mol.kg (1). Our new experimental results 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 the {yKNO(3) + (1 - y)K2HPO4}(aq) system. The present assessment yields NO3 - HPO42 mixing parameters for these models that are needed for modeling the thermodynamic activities of solute components of natural waters and other complex aqueous electrolyte mixtures. Model parameters for KNO3(aq) at T = (298.15 +/- 0.01) K were also evaluated using the present results along with critically-assessed osmotic coefficients taken from the published literature. Thermodynamic properties of the saturated solution were calculated using published solubilities of KNO3(cr) in water at T = 298.15 K and the evaluated ion-interaction model parameters for KNO3(aq).en
dc.publisherAcademic Press Ltd- Elsevier Science Ltd, London
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172063/RS//
dc.rightsrestrictedAccess
dc.sourceJournal of Chemical Thermodynamics
dc.subjectAqueous solutionsen
dc.subjectIsopiestic measurementsen
dc.subjectKNO3en
dc.subjectK2HPO4en
dc.subjectOsmotic coefficientsen
dc.subjectActivity coefficientsen
dc.titleIsopiestic determination of the osmotic and activity coefficients of the {yKNO(3) + (1-y)K2HPO4}(aq) system at T=298.15 Ken
dc.typearticle
dc.rights.licenseARR
dc.citation.epage183
dc.citation.other55: 172-183
dc.citation.rankM21
dc.citation.spage172
dc.citation.volume55
dc.identifier.doi10.1016/j.jct.2012.06.027
dc.identifier.rcubconv_3903
dc.identifier.scopus2-s2.0-84864747576
dc.identifier.wos000308075000025
dc.type.versionpublishedVersion


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