A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility

Autores
Schmidt, Juan; Ithuralde, Raúl Esteban
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
This paper presents a teaching experience involving an experiment based on the potentiostatic and electrochemical titration of a silver acetate solution with sodium hydroxide, a chemical system where at least three chemical equilibria are involved. It is known that natural samples are inherently complex, and several different chemical equilibria are simultaneously present. That is why we believe the understanding of complex systems is essential for carrying out chemical analysis. Solubility of many compounds is highly dependent on pH and many of the exercises in the inorganic chemistry classroom are focused on calculating the solubility of different species at different pHs, most of the times using speciation coefficients. However, the dependence of solubility on pH is usually analyzed in a point by point basis. This experiment, which only requires equipment usually available in any general chemistry teaching laboratory, allows students to analyze both a complex system and the dynamic nature of solubility when pH changes continuously in time. It gives them the possibility to reach a broader understanding of simultaneous chemical equilibria. Thus, we consider it to be an excellent complement to typical chemistry exercises.
Facultad de Humanidades y Ciencias de la Educación
Materia
Educación
Enseñanza de la química
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/111526
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/111526
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling A New Teaching Laboratory Experiment to Address the Effect of pH on SolubilitySchmidt, JuanIthuralde, Raúl EstebanEducaciónEnseñanza de la químicaThis paper presents a teaching experience involving an experiment based on the potentiostatic and electrochemical titration of a silver acetate solution with sodium hydroxide, a chemical system where at least three chemical equilibria are involved. It is known that natural samples are inherently complex, and several different chemical equilibria are simultaneously present. That is why we believe the understanding of complex systems is essential for carrying out chemical analysis. Solubility of many compounds is highly dependent on pH and many of the exercises in the inorganic chemistry classroom are focused on calculating the solubility of different species at different pHs, most of the times using speciation coefficients. However, the dependence of solubility on pH is usually analyzed in a point by point basis. This experiment, which only requires equipment usually available in any general chemistry teaching laboratory, allows students to analyze both a complex system and the dynamic nature of solubility when pH changes continuously in time. It gives them the possibility to reach a broader understanding of simultaneous chemical equilibria. Thus, we consider it to be an excellent complement to typical chemistry exercises.Facultad de Humanidades y Ciencias de la Educación2017-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf70-72http://sedici.unlp.edu.ar/handle/10915/111526enginfo:eu-repo/semantics/altIdentifier/issn/1430-4171info:eu-repo/semantics/altIdentifier/doi/10.1333/s00897172748ainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:06:38Zoai:sedici.unlp.edu.ar:10915/111526Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:06:39.171SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
title A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
spellingShingle A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
Schmidt, Juan
Educación
Enseñanza de la química
title_short A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
title_full A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
title_fullStr A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
title_full_unstemmed A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
title_sort A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
dc.creator.none.fl_str_mv Schmidt, Juan
Ithuralde, Raúl Esteban
author Schmidt, Juan
author_facet Schmidt, Juan
Ithuralde, Raúl Esteban
author_role author
author2 Ithuralde, Raúl Esteban
author2_role author
dc.subject.none.fl_str_mv Educación
Enseñanza de la química
topic Educación
Enseñanza de la química
dc.description.none.fl_txt_mv This paper presents a teaching experience involving an experiment based on the potentiostatic and electrochemical titration of a silver acetate solution with sodium hydroxide, a chemical system where at least three chemical equilibria are involved. It is known that natural samples are inherently complex, and several different chemical equilibria are simultaneously present. That is why we believe the understanding of complex systems is essential for carrying out chemical analysis. Solubility of many compounds is highly dependent on pH and many of the exercises in the inorganic chemistry classroom are focused on calculating the solubility of different species at different pHs, most of the times using speciation coefficients. However, the dependence of solubility on pH is usually analyzed in a point by point basis. This experiment, which only requires equipment usually available in any general chemistry teaching laboratory, allows students to analyze both a complex system and the dynamic nature of solubility when pH changes continuously in time. It gives them the possibility to reach a broader understanding of simultaneous chemical equilibria. Thus, we consider it to be an excellent complement to typical chemistry exercises.
Facultad de Humanidades y Ciencias de la Educación
description This paper presents a teaching experience involving an experiment based on the potentiostatic and electrochemical titration of a silver acetate solution with sodium hydroxide, a chemical system where at least three chemical equilibria are involved. It is known that natural samples are inherently complex, and several different chemical equilibria are simultaneously present. That is why we believe the understanding of complex systems is essential for carrying out chemical analysis. Solubility of many compounds is highly dependent on pH and many of the exercises in the inorganic chemistry classroom are focused on calculating the solubility of different species at different pHs, most of the times using speciation coefficients. However, the dependence of solubility on pH is usually analyzed in a point by point basis. This experiment, which only requires equipment usually available in any general chemistry teaching laboratory, allows students to analyze both a complex system and the dynamic nature of solubility when pH changes continuously in time. It gives them the possibility to reach a broader understanding of simultaneous chemical equilibria. Thus, we consider it to be an excellent complement to typical chemistry exercises.
publishDate 2017
dc.date.none.fl_str_mv 2017-07-01
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info:ar-repo/semantics/articulo
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/111526
url http://sedici.unlp.edu.ar/handle/10915/111526
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1430-4171
info:eu-repo/semantics/altIdentifier/doi/10.1333/s00897172748a
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
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collection SEDICI (UNLP)
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
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