Antocianinas e gelo seco para visualizar equilíbrios ácido/base numa abordagem contextualizada

Authors

  • Adriana Vitorino Rossi
  • Gustavo Giraldi Shimamoto

Abstract

We propose a versatile and accessible experiment that uses dry ice and fruit anthocyanin extracts to demonstrate and discuss concepts such as acidity, basicity, pH indicators and chemical equilibrium. It is possible because anthocyanins are natural colorants that have the pH indicator properties and are present in several vegetal species. The experiment introduces these concepts in a contextualized and interdisciplinary approach, which favors the development of skills and competencies, with STS focus.

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Published

2011-01-24

Issue

No. 7 (2010)

Section

Estratègies i recursos didàctics

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