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Formación universitaria

versión On-line ISSN 0718-5006

Resumen

MATKOVIC, Silvana R  y  BRIAND, Laura E. Interactive Lighting Device as a Teaching Resource for the Better Comprehension of the Acid-Base Concept in General Chemistry. Form. Univ. [online]. 2012, vol.5, n.3, pp.27-30. ISSN 0718-5006.  http://dx.doi.org/10.4067/S0718-50062012000300004.

A teaching resource is constructed with the aim of helping student to better comprehend the acid-base concept in general chemistry, in particular the process of color change that is observed when an acid-base indicator reacts with acid or basic species. The proposal involves an interactive lighting device easy to build. The device lights when its two parts are in contact closing an electric circuit. Therefore it has a certain color when both parts are in contact that differs from the color of the when they are apart. Additionally, the contact of natural dyes with everyday domestic substances is described as a complementary experimental section. The interactive lighting device is a teaching resource that allows correlating the interaction of a chemical species with the change of color of an acid-base indicator.

Palabras clave : chemistry teaching; acid-base; pH; acid- base indicators.

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