Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment

Autores
Marcolongo, Juan Pablo; Mirenda, Martin
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
An undergraduate laboratory experiment is presented that allows a thermodynamic characterization of micelle formation of sodium dodecyl sulfate (SDS) in aqueous solutions. The critical micelle concentration (CMC) and the degree of micelle ionization (α) are obtained at different temperatures by conductimetry. The molar standard free energy (ΔmicḠ), enthalpy (ΔmicH̄°), and entropy (Δ micS̄°) for the micellization process are calculated using the CMC, α, and their temperature dependences within the framework of a simplified model, the closed association model, which assumes an equilibrium between free surfactant monomers and monodispersed micelles. On the basis of hydration phenomena of surfactant molecules, a physicochemical discussion of the results is also proposed.
Fil: Marcolongo, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Mirenda, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Materia
Aqueous Solution Chemistry
Conductivity
Hands-On Learning/Manipulatives
Laboratory Instruction
Micelles
Organosulfur Compounds
Physical Chemistry
Thermodynamics
Upper-Division Undergraduate
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:11336/83682
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/83682
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experimentMarcolongo, Juan PabloMirenda, MartinAqueous Solution ChemistryConductivityHands-On Learning/ManipulativesLaboratory InstructionMicellesOrganosulfur CompoundsPhysical ChemistryThermodynamicsUpper-Division Undergraduatehttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1An undergraduate laboratory experiment is presented that allows a thermodynamic characterization of micelle formation of sodium dodecyl sulfate (SDS) in aqueous solutions. The critical micelle concentration (CMC) and the degree of micelle ionization (α) are obtained at different temperatures by conductimetry. The molar standard free energy (ΔmicḠ), enthalpy (ΔmicH̄°), and entropy (Δ micS̄°) for the micellization process are calculated using the CMC, α, and their temperature dependences within the framework of a simplified model, the closed association model, which assumes an equilibrium between free surfactant monomers and monodispersed micelles. On the basis of hydration phenomena of surfactant molecules, a physicochemical discussion of the results is also proposed.Fil: Marcolongo, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaFil: Mirenda, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; ArgentinaAmerican Chemical Society2011-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/83682Marcolongo, Juan Pablo; Mirenda, Martin; Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment; American Chemical Society; Journal Of Chemical Education; 88; 5; 5-2011; 629-6330021-9584CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1021/ed900019uinfo:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/ed900019uinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:47:59Zoai:ri.conicet.gov.ar:11336/83682instacron: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 10:47:59.203CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
title Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
spellingShingle Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
Marcolongo, Juan Pablo
Aqueous Solution Chemistry
Conductivity
Hands-On Learning/Manipulatives
Laboratory Instruction
Micelles
Organosulfur Compounds
Physical Chemistry
Thermodynamics
Upper-Division Undergraduate
title_short Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
title_full Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
title_fullStr Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
title_full_unstemmed Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
title_sort Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment
dc.creator.none.fl_str_mv Marcolongo, Juan Pablo
Mirenda, Martin
author Marcolongo, Juan Pablo
author_facet Marcolongo, Juan Pablo
Mirenda, Martin
author_role author
author2 Mirenda, Martin
author2_role author
dc.subject.none.fl_str_mv Aqueous Solution Chemistry
Conductivity
Hands-On Learning/Manipulatives
Laboratory Instruction
Micelles
Organosulfur Compounds
Physical Chemistry
Thermodynamics
Upper-Division Undergraduate
topic Aqueous Solution Chemistry
Conductivity
Hands-On Learning/Manipulatives
Laboratory Instruction
Micelles
Organosulfur Compounds
Physical Chemistry
Thermodynamics
Upper-Division Undergraduate
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv An undergraduate laboratory experiment is presented that allows a thermodynamic characterization of micelle formation of sodium dodecyl sulfate (SDS) in aqueous solutions. The critical micelle concentration (CMC) and the degree of micelle ionization (α) are obtained at different temperatures by conductimetry. The molar standard free energy (ΔmicḠ), enthalpy (ΔmicH̄°), and entropy (Δ micS̄°) for the micellization process are calculated using the CMC, α, and their temperature dependences within the framework of a simplified model, the closed association model, which assumes an equilibrium between free surfactant monomers and monodispersed micelles. On the basis of hydration phenomena of surfactant molecules, a physicochemical discussion of the results is also proposed.
Fil: Marcolongo, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
Fil: Mirenda, Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Inorgánica, Analítica y Química Física; Argentina
description An undergraduate laboratory experiment is presented that allows a thermodynamic characterization of micelle formation of sodium dodecyl sulfate (SDS) in aqueous solutions. The critical micelle concentration (CMC) and the degree of micelle ionization (α) are obtained at different temperatures by conductimetry. The molar standard free energy (ΔmicḠ), enthalpy (ΔmicH̄°), and entropy (Δ micS̄°) for the micellization process are calculated using the CMC, α, and their temperature dependences within the framework of a simplified model, the closed association model, which assumes an equilibrium between free surfactant monomers and monodispersed micelles. On the basis of hydration phenomena of surfactant molecules, a physicochemical discussion of the results is also proposed.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
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/11336/83682
Marcolongo, Juan Pablo; Mirenda, Martin; Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment; American Chemical Society; Journal Of Chemical Education; 88; 5; 5-2011; 629-633
0021-9584
CONICET Digital
CONICET
url http://hdl.handle.net/11336/83682
identifier_str_mv Marcolongo, Juan Pablo; Mirenda, Martin; Thermodynamics of sodium dodecyl sulfate (SDS) micellization: An undergraduate laboratory experiment; American Chemical Society; Journal Of Chemical Education; 88; 5; 5-2011; 629-633
0021-9584
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1021/ed900019u
info:eu-repo/semantics/altIdentifier/url/https://pubs.acs.org/doi/abs/10.1021/ed900019u
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_ 1844614524782510080
score 13.070432

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