Environmental coordination chemistry: Binary systems comprising some bivalent cations and monocarboxylates in aqueous solution. Ionic medium effects on equilibrium constants

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dc.contributor.authorPezza, Leonardo [UNESP]
dc.contributor.authorMolina, M.
dc.contributor.authorMelios, C. B. [UNESP]
dc.contributor.authorMoraes, M. de [UNESP]
dc.contributor.authorTognolli, J. O. [UNESP]
dc.contributor.authorGomes, H. M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Maranhão (UFMA)
dc.date.accessioned2014-05-20T15:25:39Z
dc.date.available2014-05-20T15:25:39Z
dc.date.issued1997-01-01
dc.description.abstractThe molar single activity coefficients associated with propionate ion (Pr) have been determined at 25 degrees C and ionic strengths comprised between 0.300 and 3.00 M, adjusted with NaClO4, as background electrolyte. The investigation was carried out potentiometrically by using a second class Hg/Hg2Pr2 electrode. It was found that the dependence of propionate activity coefficients as a function of ionic strength (I) can be assessed through the following empirical equation: log y(Pr) = -0.185 I-3/2 + 0.104 I-2. Next, simple equations relating stoichiometric protonation constants of several monocarboxylates and formation constants associated with 1:1 complexes involving some bivalent cations and selected monocarboxylates, in aqueous solution, at 25 degrees C, as a function of ionic strength were derived, allowing the interconversion of parameters from one ionic strength to another, up to I = 3.00 M. In addition, thermodynamic formation constants as well as parameters associated with activity coefficients of the complex species in the equilibria are estimated. The body of results shows that the proposed calculation procedure is very consistent with critically selected experimental data.en
dc.description.affiliationUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUFMA, Ctr Tecnol, Dept Quim, BR-65080040 Sao Luis, MA, Brazil
dc.description.affiliationUNESP, FCT, BR-19060900 P Prudente, SP, Brazil
dc.description.affiliationUnespUNESP, Inst Quim, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUnespUNESP, FCT, BR-19060900 P Prudente, SP, Brazil
dc.format.extent295-311
dc.identifierhttp://dx.doi.org/10.1080/03067319708030497
dc.identifier.citationInternational Journal of Environmental Analytical Chemistry. Reading: Gordon Breach Sci Publ Ltd, v. 68, n. 3, p. 295-311, 1997.
dc.identifier.doi10.1080/03067319708030497
dc.identifier.issn0306-7319
dc.identifier.lattes5978908591853524
dc.identifier.orcid0000-0003-0197-7369
dc.identifier.urihttp://hdl.handle.net/11449/36017
dc.identifier.wosWOS:000076138000001
dc.language.isoeng
dc.publisherGordon Breach Sci Publ Ltd
dc.relation.ispartofInternational Journal of Environmental Analytical Chemistry
dc.relation.ispartofjcr1.372
dc.relation.ispartofsjr0,361
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectactivity coefficientspt
dc.subjectformation constantspt
dc.subjectmedium effectspt
dc.titleEnvironmental coordination chemistry: Binary systems comprising some bivalent cations and monocarboxylates in aqueous solution. Ionic medium effects on equilibrium constantsen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
dcterms.rightsHolderGordon Breach Sci Publ Ltd
unesp.author.lattes5978908591853524
unesp.author.orcid0000-0003-0197-7369[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Química, Araraquarapt

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Artigos - Química Analítica - IQ