Visual demonstration of the ionic strength effect in the classroom: the Debye-Hückel limiting law

dc.creatorSabadini, Edvaldo
dc.creatorCarvalho, Larissa Vieira Cavalcanti
dc.date2013-01-01
dc.date2015-12-03T13:31:10Z
dc.date2015-12-03T13:31:10Z
dc.date.accessioned2018-03-29T01:25:06Z
dc.date.available2018-03-29T01:25:06Z
dc.identifierQuímica Nova. Sociedade Brasileira de Química, v. 36, n. 1, p. 187-189, 2013.
dc.identifier0100-4042
dc.identifierS0100-40422013000100031
dc.identifier10.1590/S0100-40422013000100031
dc.identifierhttp://dx.doi.org/10.1590/S0100-40422013000100031
dc.identifierhttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422013000100031
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/23942
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/202538
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1302771
dc.descriptionThe effects of ionic strength on ions in aqueous solutions are quite relevant, especially for biochemical systems, in which proteins and amino acids are involved. The teaching of this topic and more specifically, the Debye-Hückel limiting law, is central in chemistry undergraduate courses. In this work, we present a description of an experimental procedure based on the color change of aqueous solutions of bromocresol green (BCG), driven by addition of electrolyte. The contribution of charge product (z+|z-|) to the Debye-Hückel limiting law is demonstrated when the effects of NaCl and Na2SO4 on the color of BCG solutions are compared.
dc.description187
dc.description189
dc.languageen
dc.publisherSociedade Brasileira de Química
dc.relationQuímica Nova
dc.rightsaberto
dc.sourceSciELO
dc.subjectcolor change
dc.subjectionic strength effect
dc.subjectvisualization of the Debye-Hückel law
dc.titleVisual demonstration of the ionic strength effect in the classroom: the Debye-Hückel limiting law
dc.typeArtículos de revistas


Este ítem pertenece a la siguiente institución