Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities

Autores
Gagliardi, Leonardo Gabriel; Castells, Cecilia Beatriz Marta; Rosés, Martí; Ràfols, Clara; Bosch, Elisabeth
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Potassium hydrogen phthalate (KHP) is a primary titrimetric standard, and KHP solutions are also used as standards for pH reference values, in pure water or in hydrorganic solvent mixtures. However, the pH of these solutions can be affected by any shift in the pKa1 or pKa2 of the substance due to changes in the solvent composition or temperature. In this work, the two dissociation constants of o-phthalic acid were independently determined for different compositions of acetonitrile/water mixtures within the range from 0 % to 70 % by weight, in steps of 10 %, and at different temperatures from (15 to 50) °C, in steps of 5 °C. The dependence of ln Ka on the inverse of temperature has been examined by using statistical methods, and the corresponding ionization thermodynamic functions have been calculated for different acetonitrile compositions.
Fil: Gagliardi, Leonardo Gabriel. Universidad de Barcelona; España. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentina
Fil: Castells, Cecilia Beatriz Marta. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentina
Fil: Rosés, Martí. Universidad de Barcelona; España
Fil: Ràfols, Clara. Universidad de Barcelona; España
Fil: Bosch, Elisabeth. Universidad de Barcelona; España
Materia
DISSOCIATION CONSTANT
ACETONITRILE/WATER MIXTURES
PHTHALIC ACID
TEMPERATURA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/95495
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantitiesGagliardi, Leonardo GabrielCastells, Cecilia Beatriz MartaRosés, MartíRàfols, ClaraBosch, ElisabethDISSOCIATION CONSTANTACETONITRILE/WATER MIXTURESPHTHALIC ACIDTEMPERATURAhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Potassium hydrogen phthalate (KHP) is a primary titrimetric standard, and KHP solutions are also used as standards for pH reference values, in pure water or in hydrorganic solvent mixtures. However, the pH of these solutions can be affected by any shift in the pKa1 or pKa2 of the substance due to changes in the solvent composition or temperature. In this work, the two dissociation constants of o-phthalic acid were independently determined for different compositions of acetonitrile/water mixtures within the range from 0 % to 70 % by weight, in steps of 10 %, and at different temperatures from (15 to 50) °C, in steps of 5 °C. The dependence of ln Ka on the inverse of temperature has been examined by using statistical methods, and the corresponding ionization thermodynamic functions have been calculated for different acetonitrile compositions.Fil: Gagliardi, Leonardo Gabriel. Universidad de Barcelona; España. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; ArgentinaFil: Castells, Cecilia Beatriz Marta. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; ArgentinaFil: Rosés, Martí. Universidad de Barcelona; EspañaFil: Ràfols, Clara. Universidad de Barcelona; EspañaFil: Bosch, Elisabeth. Universidad de Barcelona; EspañaAmerican Chemical Society2010-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/95495Gagliardi, Leonardo Gabriel; Castells, Cecilia Beatriz Marta; Rosés, Martí; Ràfols, Clara; Bosch, Elisabeth; Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities; American Chemical Society; Journal of Chemical and Engineering Data; 55; 1; 1-2010; 85-910021-9568CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/je900273dinfo:eu-repo/semantics/altIdentifier/doi/10.1021/je900273dinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:29:50Zoai:ri.conicet.gov.ar:11336/95495instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:29:50.722CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
title Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
spellingShingle Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
Gagliardi, Leonardo Gabriel
DISSOCIATION CONSTANT
ACETONITRILE/WATER MIXTURES
PHTHALIC ACID
TEMPERATURA
title_short Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
title_full Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
title_fullStr Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
title_full_unstemmed Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
title_sort Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities
dc.creator.none.fl_str_mv Gagliardi, Leonardo Gabriel
Castells, Cecilia Beatriz Marta
Rosés, Martí
Ràfols, Clara
Bosch, Elisabeth
author Gagliardi, Leonardo Gabriel
author_facet Gagliardi, Leonardo Gabriel
Castells, Cecilia Beatriz Marta
Rosés, Martí
Ràfols, Clara
Bosch, Elisabeth
author_role author
author2 Castells, Cecilia Beatriz Marta
Rosés, Martí
Ràfols, Clara
Bosch, Elisabeth
author2_role author
author
author
author
dc.subject.none.fl_str_mv DISSOCIATION CONSTANT
ACETONITRILE/WATER MIXTURES
PHTHALIC ACID
TEMPERATURA
topic DISSOCIATION CONSTANT
ACETONITRILE/WATER MIXTURES
PHTHALIC ACID
TEMPERATURA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Potassium hydrogen phthalate (KHP) is a primary titrimetric standard, and KHP solutions are also used as standards for pH reference values, in pure water or in hydrorganic solvent mixtures. However, the pH of these solutions can be affected by any shift in the pKa1 or pKa2 of the substance due to changes in the solvent composition or temperature. In this work, the two dissociation constants of o-phthalic acid were independently determined for different compositions of acetonitrile/water mixtures within the range from 0 % to 70 % by weight, in steps of 10 %, and at different temperatures from (15 to 50) °C, in steps of 5 °C. The dependence of ln Ka on the inverse of temperature has been examined by using statistical methods, and the corresponding ionization thermodynamic functions have been calculated for different acetonitrile compositions.
Fil: Gagliardi, Leonardo Gabriel. Universidad de Barcelona; España. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentina
Fil: Castells, Cecilia Beatriz Marta. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Tecnología de Pinturas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones en Tecnología de Pinturas; Argentina
Fil: Rosés, Martí. Universidad de Barcelona; España
Fil: Ràfols, Clara. Universidad de Barcelona; España
Fil: Bosch, Elisabeth. Universidad de Barcelona; España
description Potassium hydrogen phthalate (KHP) is a primary titrimetric standard, and KHP solutions are also used as standards for pH reference values, in pure water or in hydrorganic solvent mixtures. However, the pH of these solutions can be affected by any shift in the pKa1 or pKa2 of the substance due to changes in the solvent composition or temperature. In this work, the two dissociation constants of o-phthalic acid were independently determined for different compositions of acetonitrile/water mixtures within the range from 0 % to 70 % by weight, in steps of 10 %, and at different temperatures from (15 to 50) °C, in steps of 5 °C. The dependence of ln Ka on the inverse of temperature has been examined by using statistical methods, and the corresponding ionization thermodynamic functions have been calculated for different acetonitrile compositions.
publishDate 2010
dc.date.none.fl_str_mv 2010-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/95495
Gagliardi, Leonardo Gabriel; Castells, Cecilia Beatriz Marta; Rosés, Martí; Ràfols, Clara; Bosch, Elisabeth; Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities; American Chemical Society; Journal of Chemical and Engineering Data; 55; 1; 1-2010; 85-91
0021-9568
CONICET Digital
CONICET
url http://hdl.handle.net/11336/95495
identifier_str_mv Gagliardi, Leonardo Gabriel; Castells, Cecilia Beatriz Marta; Rosés, Martí; Ràfols, Clara; Bosch, Elisabeth; Acid-base dissociation constants of o-phthalic acid in acetonitrile/water mixtures over the (15 to 50) °C temperature range and related thermodynamic quantities; American Chemical Society; Journal of Chemical and Engineering Data; 55; 1; 1-2010; 85-91
0021-9568
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/10.1021/je900273d
info:eu-repo/semantics/altIdentifier/doi/10.1021/je900273d
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
_version_ 1844614305712963584
score 13.070432

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