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Title: Aplicação de pigmentos de flores no ensino de química
Keywords: colour change of crude flower extract
acid-base equilibrium
Issue Date: 30-May-2013
Publisher: Sociedade Brasileira de Química
Description: In the present work, the pH dependent colour change of the crude flower extracts is suggested as subject in teaching chemical or acid-base equilibria, visual indicators and some aspects of spectrophotometric concepts and applications. The vegetal species used are commonly found in Brazil, and the extraction methodology proposed is inexpensive and easy to perform in secondary schools and in general chemistry or instrumental undergraduate courses. A bibliographic review about the use of vegetal extracts in chemical education and a discussion of the flower colour are also presented.
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Appears in Collections:Chemistry

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