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Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K
dc.creator | Popović, Daniela | |
dc.creator | Miladinović, Jelena | |
dc.creator | Miladinović, Zoran P. | |
dc.creator | Grujić, Snežana | |
dc.creator | Todorović, Milica D. | |
dc.creator | Rard, Joseph A. | |
dc.date.accessioned | 2021-03-10T12:16:04Z | |
dc.date.available | 2021-03-10T12:16:04Z | |
dc.date.issued | 2013 | |
dc.identifier.issn | 0021-9614 | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2532 | |
dc.description.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. | en |
dc.publisher | Academic Press Ltd- Elsevier Science Ltd, London | |
dc.relation | info:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172063/RS// | |
dc.rights | restrictedAccess | |
dc.source | Journal of Chemical Thermodynamics | |
dc.subject | Aqueous solutions | en |
dc.subject | Isopiestic measurements | en |
dc.subject | KBr | en |
dc.subject | K2HPO4 | en |
dc.subject | Osmotic coefficients | en |
dc.subject | Activity coefficients | en |
dc.title | Isopiestic determination of the osmotic and activity coefficients of the {yKBr + (1-y)K2HPO4}(aq) system at T=298.15 K | en |
dc.type | article | |
dc.rights.license | ARR | |
dc.citation.epage | 161 | |
dc.citation.other | 62: 151-161 | |
dc.citation.rank | M21 | |
dc.citation.spage | 151 | |
dc.citation.volume | 62 | |
dc.identifier.doi | 10.1016/j.jct.2013.03.003 | |
dc.identifier.scopus | 2-s2.0-84876140946 | |
dc.identifier.wos | 000318612000019 | |
dc.type.version | publishedVersion |