Description: A bottle half-full of a colorless liquid is shaken and turns blue. On standing undisturbed, the blue color fades. The cycle may be repeated several times. Other colors can be produced by substituting other indicators for the methylene blue commonly used.
This demonstration is also available on video and JCE "Chemistry Comes Alive!" Vol. 3 CD-Rom.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year or vol: 2 page: 142
Keywords: Blue Bottle, Oxygen, dextrose, glucose