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

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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 com...

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Autores principales: Schmidt, Juan, Ithuralde, Raúl Esteban
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Educación
Enseñanza de la química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/111526
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-111526
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Educación
Enseñanza de la química
spellingShingle Educación
Enseñanza de la química
Schmidt, Juan
Ithuralde, Raúl Esteban
A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
topic_facet Educación
Enseñanza de la química
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.
format Articulo
Articulo
author Schmidt, Juan
Ithuralde, Raúl Esteban
author_facet Schmidt, Juan
Ithuralde, Raúl Esteban
author_sort Schmidt, Juan
title A New Teaching Laboratory Experiment to Address the Effect of pH on Solubility
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 new teaching laboratory experiment to address the effect of ph on solubility
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/111526
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