Enhancing undergraduates’ conceptual understanding of organic acid-base-neutral extraction using inquiry-based experiments (Saksri Supasorn, 2012)

 

Saksri Supasorn. (2012). Enhancing undergraduates’ conceptual understanding of organic acid-base-neutral extraction using inquiry-based experiments. Procedia social and behavioral sciences, 46, 4643-4650.

 

WCES 2012
Enhancing undergraduates’ conceptual understanding of organic acid-base-neutral extraction using inquiry-based experiments

Saksri Supasorn a *
a Department of Chemistry, Faculty of Science, Ubon Ratchathani University,Ubon Ratchathani 34190, Thailand

Abstract
The inclusion of an inquiry-based learning approach in chemistry laboratories has been advocated highly in the last three decades
to improve students’ conceptual content knowledge and the process of inquiry learning. Two 3-hour experiments involving acidbase
extraction and purification were implemented for 63 students enrolled in Organic Chemistry Lab II in 2010. Students were
asked to separate each compound from a mixture of benzoic acid, p-nitroaniline, and naphthalene, and to purify each compound
in an appropriate condition. Paired-samples t-test analysis indicated that the students obtained post-achievement scores for the
conceptual test, the experimental procedure diagram, and the mental models of acid-based extraction process statistically higher
than pre-experiment scores at p-value less than 0.001. Although most students had planned their experiments carefully, some
students still accommodated alternative conceptions in their mental models. However, most of them could correct their
alternative conceptions to the scientific consensus after experiencing the inquiry-based experiment. It is advisable to implement
inquiry experiments for at least a few semesters to investigate students’ progression with science inquiry and process skills.
© 2012 Published by Elsevier Ltd.
Keywords: Inquiry-based experiment, organic extraction, purification, mental models;

Last Updated on Tuesday, 04 September 2012 11:56  

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