Um experimento com propostas múltiplas para um laboratório de química geral

This article suggests a sequence of experiments on the preparation, analysis and some photochemical aspects of potassium tris (oxalato) ferrate(III) trihydrate. The sequence of experiments could be carried out in four or five 4-hour laboratory periods. The new part of this article is related to the...

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Bibliographic Details
Published inQuímica nova Vol. 25; no. 6a; pp. 1034 - 1039
Main Authors Simoni, Déborah de Alencar, Andrade, João Carlos de, Faigle, José Fernando Gregório, Simoni, José de Alencar
Format Journal Article
LanguageEnglish
Published Sociedade Brasileira de Química 01.11.2002
Subjects
general chemistry
kinetic
photochemical reactions
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Summary:This article suggests a sequence of experiments on the preparation, analysis and some photochemical aspects of potassium tris (oxalato) ferrate(III) trihydrate. The sequence of experiments could be carried out in four or five 4-hour laboratory periods. The new part of this article is related to the kinetics studies involving the ambient illumination as well as the use of the cellophane paper of different colors as light filters. The aspects such as quantum yield, light absorption and photochemical reactions are explored in order to illustrate the relationships between the exposure time, light intensity and wavelength range on the photochemical reactions.
ISSN:0100-4042
1678-7064
DOI:10.1590/S0100-40422002000600023