Determination of Pitzer parameters for sodium benzoate at 298.15 K

Detalhes bibliográficos
Autor(a) principal: Mendonça, António
Data de Publicação: 2001
Outros Autores: Vaz, Margarida, Ferra, Maria I.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.6/12319
Resumo: Sodium benzoate is a salt widely used in industry as preserver. Its activity coefficients in aqueous solutions can be estimated by Pitzer theory, once the necessary parameters are known. Electromotive force (emf) measurements on galvanic cells without liquid junction have been used for the determination o f mean activity coefficients of sodium chloride in the ternary system sodium chloride + sodium benzoate (NaB) + water. Pitzer theory has been applied to this system and those data enabled the evaluation of the specific parameters for sodium benzoate at 298.15 K by linear regression. The values obtained f o r / B(0) NaB and B(1) NaB parameters, respectively 0.177 kg mol-1 and 0.34 kg mol-1 are close to those published already for other carboxylic acid salts.
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spelling Determination of Pitzer parameters for sodium benzoate at 298.15 KSodium benzoateActivity coefficientsPitzer theoryPotentiometrySodium benzoate is a salt widely used in industry as preserver. Its activity coefficients in aqueous solutions can be estimated by Pitzer theory, once the necessary parameters are known. Electromotive force (emf) measurements on galvanic cells without liquid junction have been used for the determination o f mean activity coefficients of sodium chloride in the ternary system sodium chloride + sodium benzoate (NaB) + water. Pitzer theory has been applied to this system and those data enabled the evaluation of the specific parameters for sodium benzoate at 298.15 K by linear regression. The values obtained f o r / B(0) NaB and B(1) NaB parameters, respectively 0.177 kg mol-1 and 0.34 kg mol-1 are close to those published already for other carboxylic acid salts.Sociedade Portuguesa de ElectroquímicauBibliorumMendonça, AntónioVaz, MargaridaFerra, Maria I.2022-08-25T09:00:13Z20012001-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/12319engmetadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-15T09:55:27Zoai:ubibliorum.ubi.pt:10400.6/12319Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:51:57.345748Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Determination of Pitzer parameters for sodium benzoate at 298.15 K
title Determination of Pitzer parameters for sodium benzoate at 298.15 K
spellingShingle Determination of Pitzer parameters for sodium benzoate at 298.15 K
Mendonça, António
Sodium benzoate
Activity coefficients
Pitzer theory
Potentiometry
title_short Determination of Pitzer parameters for sodium benzoate at 298.15 K
title_full Determination of Pitzer parameters for sodium benzoate at 298.15 K
title_fullStr Determination of Pitzer parameters for sodium benzoate at 298.15 K
title_full_unstemmed Determination of Pitzer parameters for sodium benzoate at 298.15 K
title_sort Determination of Pitzer parameters for sodium benzoate at 298.15 K
author Mendonça, António
author_facet Mendonça, António
Vaz, Margarida
Ferra, Maria I.
author_role author
author2 Vaz, Margarida
Ferra, Maria I.
author2_role author
author
dc.contributor.none.fl_str_mv uBibliorum
dc.contributor.author.fl_str_mv Mendonça, António
Vaz, Margarida
Ferra, Maria I.
dc.subject.por.fl_str_mv Sodium benzoate
Activity coefficients
Pitzer theory
Potentiometry
topic Sodium benzoate
Activity coefficients
Pitzer theory
Potentiometry
description Sodium benzoate is a salt widely used in industry as preserver. Its activity coefficients in aqueous solutions can be estimated by Pitzer theory, once the necessary parameters are known. Electromotive force (emf) measurements on galvanic cells without liquid junction have been used for the determination o f mean activity coefficients of sodium chloride in the ternary system sodium chloride + sodium benzoate (NaB) + water. Pitzer theory has been applied to this system and those data enabled the evaluation of the specific parameters for sodium benzoate at 298.15 K by linear regression. The values obtained f o r / B(0) NaB and B(1) NaB parameters, respectively 0.177 kg mol-1 and 0.34 kg mol-1 are close to those published already for other carboxylic acid salts.
publishDate 2001
dc.date.none.fl_str_mv 2001
2001-01-01T00:00:00Z
2022-08-25T09:00:13Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.6/12319
url http://hdl.handle.net/10400.6/12319
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language eng
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dc.publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
publisher.none.fl_str_mv Sociedade Portuguesa de Electroquímica
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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