Reversalbe Reaction

[KFC]

I Saw A Show Television(About Chemistry) And They Had An Experiment. They Had A Flask Liquid And A Clear Gas Then He Shook The Flask And The Liquid Turned Blue, After 30 Seconds It Turned Clear Again. Its A Reaction That You Can Do Over And Over Again. What Was The Liquid And The Gas?

[woelen]

Have a look at this link: http://science.csustan.edu/stkrm/Recipes/Recipes-Blue.htm

 

Indeed, it is a nice demo.