Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K

Detalhes bibliográficos
Autor(a) principal: Mendonça, António
Data de Publicação: 2005
Outros Autores: Juusola, Pekka M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.6/12316
Resumo: Pitzer model parameters and modified Guggenheim equation parameters for dipotassium phthalate (K2PH) and potassium hydrogen phthalate (KHPh) were determined from cell potential difference (cpd) measurements on galvanic cells without liquid junction. Mean activity coefficients of these salts in water at 298.15 K were calculated by the Pitzer model and modified Guggenheim equations. The Pitzer parameters values obtained for K2Ph where: Beta 0(K2Ph)+steta(Cl,Ph) = 0.25 ± 0.01 mol−1 kg; Beta 1 (K2Ph)= 0.86 ± 0.08 mol−1 kg; C(K2Ph)= −0.010 ± 0.002 mol−2 kg2 and ΨK,Cl,Ph = 0.014 ± 0.005 mol−2 kg2. The Pitzer parameters values obtained for KHPh were: Beta0 (KHPh + steta(Cl,Ph)= 0.084 ± 0.013 mol−1 kg, = 0 mol−1 kg. The results were also compared to the values obtained from Pitzer parameters published in literature. The parameter values for the modified Guggenheim equations (bK,Ph = −0.041 mol−1 kg and bK,HPh = −0.020 mol−1 kg) obtained in this study were used in the mean activity coefficients calculations. The modified Guggenheim equation allows us to obtain similar mean activity coefficient values, as the Pitzer equation, up to 1.5 mol kg−1 ionic strength for K2Ph and 0.5 mol kg−1 for KHPh.
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spelling Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15KDipotassium phthalatePotassium hydrogen phthalateActivity coefficientsPitzer modelGuggenheim modelPitzer model parameters and modified Guggenheim equation parameters for dipotassium phthalate (K2PH) and potassium hydrogen phthalate (KHPh) were determined from cell potential difference (cpd) measurements on galvanic cells without liquid junction. Mean activity coefficients of these salts in water at 298.15 K were calculated by the Pitzer model and modified Guggenheim equations. The Pitzer parameters values obtained for K2Ph where: Beta 0(K2Ph)+steta(Cl,Ph) = 0.25 ± 0.01 mol−1 kg; Beta 1 (K2Ph)= 0.86 ± 0.08 mol−1 kg; C(K2Ph)= −0.010 ± 0.002 mol−2 kg2 and ΨK,Cl,Ph = 0.014 ± 0.005 mol−2 kg2. The Pitzer parameters values obtained for KHPh were: Beta0 (KHPh + steta(Cl,Ph)= 0.084 ± 0.013 mol−1 kg, = 0 mol−1 kg. The results were also compared to the values obtained from Pitzer parameters published in literature. The parameter values for the modified Guggenheim equations (bK,Ph = −0.041 mol−1 kg and bK,HPh = −0.020 mol−1 kg) obtained in this study were used in the mean activity coefficients calculations. The modified Guggenheim equation allows us to obtain similar mean activity coefficient values, as the Pitzer equation, up to 1.5 mol kg−1 ionic strength for K2Ph and 0.5 mol kg−1 for KHPh.Elsevier B.V.uBibliorumMendonça, AntónioJuusola, Pekka M.2022-08-24T15:56:51Z2005-01-242005-01-24T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.6/12316engDe Mendonça, A. J. G., & Juusola, P. M. (2005). Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15 K. Fluid Phase Equilibria, 231(1), 114-124. doi:10.1016/j.fluid.2005.01.00610.1016/j.fluid.2005.01.006metadata 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:10400.6/12316Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:51:57.208221Repositório 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 Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
title Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
spellingShingle Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
Mendonça, António
Dipotassium phthalate
Potassium hydrogen phthalate
Activity coefficients
Pitzer model
Guggenheim model
title_short Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
title_full Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
title_fullStr Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
title_full_unstemmed Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
title_sort Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
author Mendonça, António
author_facet Mendonça, António
Juusola, Pekka M.
author_role author
author2 Juusola, Pekka M.
author2_role author
dc.contributor.none.fl_str_mv uBibliorum
dc.contributor.author.fl_str_mv Mendonça, António
Juusola, Pekka M.
dc.subject.por.fl_str_mv Dipotassium phthalate
Potassium hydrogen phthalate
Activity coefficients
Pitzer model
Guggenheim model
topic Dipotassium phthalate
Potassium hydrogen phthalate
Activity coefficients
Pitzer model
Guggenheim model
description Pitzer model parameters and modified Guggenheim equation parameters for dipotassium phthalate (K2PH) and potassium hydrogen phthalate (KHPh) were determined from cell potential difference (cpd) measurements on galvanic cells without liquid junction. Mean activity coefficients of these salts in water at 298.15 K were calculated by the Pitzer model and modified Guggenheim equations. The Pitzer parameters values obtained for K2Ph where: Beta 0(K2Ph)+steta(Cl,Ph) = 0.25 ± 0.01 mol−1 kg; Beta 1 (K2Ph)= 0.86 ± 0.08 mol−1 kg; C(K2Ph)= −0.010 ± 0.002 mol−2 kg2 and ΨK,Cl,Ph = 0.014 ± 0.005 mol−2 kg2. The Pitzer parameters values obtained for KHPh were: Beta0 (KHPh + steta(Cl,Ph)= 0.084 ± 0.013 mol−1 kg, = 0 mol−1 kg. The results were also compared to the values obtained from Pitzer parameters published in literature. The parameter values for the modified Guggenheim equations (bK,Ph = −0.041 mol−1 kg and bK,HPh = −0.020 mol−1 kg) obtained in this study were used in the mean activity coefficients calculations. The modified Guggenheim equation allows us to obtain similar mean activity coefficient values, as the Pitzer equation, up to 1.5 mol kg−1 ionic strength for K2Ph and 0.5 mol kg−1 for KHPh.
publishDate 2005
dc.date.none.fl_str_mv 2005-01-24
2005-01-24T00:00:00Z
2022-08-24T15:56:51Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.6/12316
url http://hdl.handle.net/10400.6/12316
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv De Mendonça, A. J. G., & Juusola, P. M. (2005). Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15 K. Fluid Phase Equilibria, 231(1), 114-124. doi:10.1016/j.fluid.2005.01.006
10.1016/j.fluid.2005.01.006
dc.rights.driver.fl_str_mv metadata only access
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rights_invalid_str_mv metadata only access
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dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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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