Uma interpretação microscopica para a analise sistematica de cations / A microscopical interpretation for systematic cations analysis

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

The systematic cations analysis is a common practice in analytical chemistry laboratory for undergraduate students and also at the industry, for identification of different kinds of unknown samples. This practice is a result of a vast knowledge in chemistry acumulated during decades by researchers and cientists who knew the reactivity of several classes of organic and inorganic compounds, as well as its properties. In order to show the basic methods of ions identification and separation, this systematic analysis attain the desired objective. However, it is not known so far any text that discuss the chemistry concepts that relates the stages of cations separation and identification. In this work a didactic material was elaborated for undergraduate students, emphasiting the fundaments, concepts and theories involved in each one of the methods of systematic cations analysis. This supplementary didactic material was created in order to improve the currently used material. The same division of cations groups presented in the qualitative analytical chemistry books was mantained. The elaborated didactic material was applied in classes of this subject at Chemistry Institute of Unicamp and the results were collected by means of questionnaires and also classes participation and observation

ASSUNTO(S)

chemical cations - separação quimica analitica analytical chemistry quimica - estudo e ensino cations

ACESSO AO ARTIGO

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