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Document Type

Article

Abstract

This article first presents a cookbook activity that leads students step-by-step through determining the density of a gas produced in a chemical reaction. This activity is problematic for two reasons. First, students may simply follow the provided directions without really understanding the investigative set-up and procedure. Second, the cookbook activity ignores the difficulties students have accepting that gases have mass and that mass is conserved in chemical reactions. I illustrate how the activity may be modified to address the common misconception that gases have no mass, and develop a deeper understanding of conservation of mass. This article promotes National Science Education Content Standards A and B and Iowa Teaching Standards 2, 3, 4, and 5.

Publication Date

Winter 2008

Journal Title

Iowa Science Teachers Journal

Volume

35

Issue

1

First Page

3

Last Page

6

Copyright

© Copyright 2008 by the Iowa Academy of Science

Language

en

File Format

application/pdf

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