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Potentiometric titration of hydrochloric acid dilute solution using a metrological approach

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dc.contributor.author Borges, Paulo Paschoal
dc.contributor.author Fraga, Isabel Cristina Serta
dc.contributor.author Ordine, Alberto Pires
dc.contributor.author Carnaval, H. C.
dc.contributor.author Rossini, Bruno César
dc.contributor.author Dias, Júlio Cesar
dc.contributor.author Augusto, Cristiane Rodrigues
dc.contributor.author Andrade, Joyce Costa
dc.contributor.author Dias, Júlio Cesar
dc.contributor.author Borges, Paulo Paschoal
dc.contributor.author Couto, Paulo Roberto Guimarães
dc.contributor.author Cunha, Valnei Smarçaro da
dc.contributor.author Silva Junior, Wiler Batista da
dc.contributor.author Fraga, Sandra Regina Gomes
dc.contributor.author Monteiro, Tânia Maria
dc.contributor.author Araújo, Thiago de Oliveira
dc.contributor.author Silva, Viviane Fernandes da
dc.contributor.author Gomes, Eduardo Rodrigues
dc.contributor.author Bernardes, Américo Tristão
dc.date.accessioned 2020-07-20T00:25:50Z
dc.date.available 2020-07-20T00:25:50Z
dc.date.issued 2006
dc.identifier.citation BORGES, Paulo Paschoal; FRAGA, Isabel Cristina Serta; ORDINE, Alberto Pires; CARNAVAL, H. C.; ROSSINI, Bruno César; DIAS, Júlio Cesar. Potentiometric titration of hydrochloric acid dilute solution using a metrological approach. In: XVIII IMEKO WORLD CONGRESS, 2006, Rio de Janeiro. Anais... Rio de Janeiro : Inmetro, 2006.
dc.identifier.uri http://hdl.handle.net/123456789/1323
dc.description.abstract Primary methods of measurement are essential in the realization of the SI units. In 1995, the CCQM (Comité Consultatif pour la Quantité de Matière) identified titrimetry as a primary method of measurement. Titrimetry is a method that has wide range of applications for amount of substance measurements and can be applied at primary level and at working level depending on the uncertainty values. The aim of this work is to present the results of potentiometric titration of a dilute solution of hydrochloric acid (HCl). The potentiometric titration method was carried out with the solution addition controlled gravimetrically. The results were accurate and HCl concentration of (0.010042 ± 0.000112) mol kg−1, k = 2 for approximately 95% confidence level was obtained. The molality determination of HCl solution is a prerequisite for the use of a Harned cell the primary method for the realization of pH measurement. The HCl solution is used in the pH primary system at Inmetro to obtain accurate value of the silver-silver chloride electrode potential. This standard potential is very important for the correct measurement of pH to certificate pH buffer.
dc.format.extent 3 p. : il.
dc.language.iso eng
dc.rights Open Access
dc.title Potentiometric titration of hydrochloric acid dilute solution using a metrological approach
dc.type Artigo
dc.subject.keyword Titulação potenciométrica
dc.subject.keyword Gravimetria
dc.subject.keyword Ácido clorídrico
dc.subject.keyword Medição de pH
dc.subject.keyword Confiabilidade metrológica


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