Here is one of my favorite chemical demonstrations of all time. It is the old iodine clock reaction. What happens is that there is a chemical equillibrium that happens and the different species change colors. Eventually, the system runs out of energy and stops changing color.[youtuber youtube=’http://www.youtube.com/watch?v=LcHKWChwP58′]
When I first started in the cosmetic industry, I always thought this would be a cool effect. Imagine having your product “blink” on the store shelves.
Unfortunately, it’s just not practical for a cosmetic product.
Here’s a good explanation of the chemical reactions that are happening.[youtuber youtube=’http://www.youtube.com/watch?feature=endscreen&NR=1&v=vb9FefEFPDY’]