Activity coefficients of dipotassium phthalate and potassium hydrogen phthalate in water at 298.15K
Autor(a) principal: | |
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Data de Publicação: | 2005 |
Outros Autores: | |
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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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 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
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 |
instacron_str |
RCAAP |
institution |
RCAAP |
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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1799136408055578624 |