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Oscillating Chemical Reaction

In this video clip at Centripetal Notion blog, you'll see a neat example of an oscillating chemical reaction:

The Briggs-Rauscher oscillating reaction is one of a small number of known oscillating chemical reactions. It is especially well suited for demonstration purposes because of its visually striking color changes: the freshly prepared colorless solution slowly turns an amber color, suddenly changing to a very dark blue. This slowly fades to colorless and the process repeats, about ten times in the most popular formulation, before ending as a dark blue liquid smelling strongly of iodine.

http://centripetalnotion.com/2008/01/24/13:36:26/ [embedded YouTube]


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This is so cool! I actually saw this when I was in high school around 1977 during a field trip to the Chemistry Dept at the Univ. of South Carolina. The Youtube link says this reaction was discovered by a couple of high school chem teachers during the '70s. Figures a bunch of science geeks would use it to show of to a bunch of high school kids!
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