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In The Yellow and Blue Switcheroo: An Oscillating Chemical Reaction—ChemTopic™ Lab Activity, three colorless solutions are mixed to produce a yellow solution that suddenly turns blue then fades to colorless and turns yellow again. The color will continue to oscillate for 10–15 minutes. It’s a definite show-stopper. Available as part of the Chemical Reactions—ChemTopic™ Labs digital collection. Click the Price link for digital collection pricing.