Artículo

Determination of the pKa value of phenolphthalein by means of absorbance measurements

Alonso, Manuel; Chapela, Sebastián P.; Cristaldo, María L.; Nievas, Inés; Burgos Oliver Gamondi, Hilda I.; Stella, Carlos AlbertoIcon
Fecha de publicación: 09/2010
Editorial: Scientific Research
Revista: Creative Education
ISSN: 2151-4755
e-ISSN: 2151-4755
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:

Resumen

We here report a laboratory protocol for the determination of the pKa value of an acid by means of determinations obtained with a spectrophotometer. Students determine the acidity constant (Ka) and the pKa associated with phenolphthalein from the absorbance values obtained from phenolphthalein solutions at different pHs. The present protocol for the determination of the pKa takes a very short time and is useful when teaching in conditions with limited equipment.
Palabras clave: Medical Science Teaching
 
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/15288
DOI: http://dx.doi.org/10.4236/ce.2010.12020
URL: http://www.scirp.org/(S(i43dyn45teexjx455qlt3d2q))/journal/PaperInformation.aspx
Colecciones
Articulos(BIOMED)
Articulos de INSTITUTO DE INVESTIGACIONES BIOMEDICAS
Articulos(INBIOMED)
Articulos de INSTITUTO DE INVESTIGACIONES BIOMEDICAS
Citación
Alonso, Manuel; Chapela, Sebastián P.; Cristaldo, María L.; Nievas, Inés; Burgos Oliver Gamondi, Hilda I.; et al.; Determination of the pKa value of phenolphthalein by means of absorbance measurements; Scientific Research; Creative Education; 1; 2; 9-2010; 130-133
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