Experiencias sorprendentes de química con indicadores de pH caseros
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Abstract
En este trabajo se describen varias experiencias sencillas relacionadas con las reacciones ácido-base. Todas ellas pueden realizarse con utensilios de cocina y usando sustancias baratas que pueden encontrarse fácilmente en un supermercado, una farmacia o en casa. En concreto, se describe la forma de obtener algunos indicadores de pH a partir de extractos vegetales o de medicamentos. Además, se proponen varias experiencias en las que se hace uso de estos indicadores con el fin de estudiar las reacciones ácido-base. Todas estas experiencias están enfocadas a alumnos de enseñanza secundaria.
Palabras clave: demostraciones de química, experiencias de química, indicadores de pH, materiales y reactivos caseros.
Amazing chemistry experiences with home pH indicators
In this work, several experiments related with acid-base chemical reactions are described. All the experiments can be done with kitchen utensils and using cheap substances that can be easily found in supermarkets, pharmacies and even at home. Specifically, it is described how to obtain pH indicators from vegetal extracts and medicines. In addition, several experiments using these pH indicators are proposed in order to study the acid-base chemical reactions. All these experiments are addressed to secondary school students.
Keywords: Chemistry experiments; pH indicators; home materials and reagents; chemical demonstrations.
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