Alternative Demonstrations of Slow Processes IV: Video Clips Presenting Diffusion in Gases and Liquids

TCE

The Chemical Educator

ISSN: 1430-4171 (electronic version)

Table of Contents

Abstract Volume x Issue x (2006) pp 259-261

Alternative Demonstrations of Slow Processes IV: Video Clips Presenting Diffusion in Gases and Liquids

Marina Monković, Vladimir M. Petruševski,* and Metodija Najdoski

Department of Chemistry, Faculty of Natural Sciences and Mathematics, University Sts. Cyril and Methodius, Arhimedova 5, 1000 Skopje, Republic of Macedonia, vladop@iunona.pmf.ukim.edu.mk
Received December 7, 2005. Accepted May 27, 2006.

Published online: 12 June 2006

Abstract. It is well known that long-lasting (marathon) chemical experiments are not convenient for use as classical chemical demonstrations, simply due to their duration. Thus, the phenomena of chemical waves, diffusion, osmosis, etc, although very attractive and with high education value, are not suitable as lecture demonstrations. Some of them are often organized as corridor or exhibition demonstrations. In order to enable instructors to demonstrate these phenomena in real time, we offer the fast-motion technique, condensing an experiment that originally lasts several hours or even days into a half-minute movie. Examples are given for gas–gas and solid–liquid diffusion and are supported by video clips.

Key Words: Laboratories and Demonstrations; general chemistry; diffusion; gas

(*) Corresponding author. (E-mail: vladop@iunona.pmf.ukim.edu.mk)

Article in PDF format (341 KB) HTML format

Supporting Materials:

Both video clips are available in a Zip file (24.6 MB).