Watch an AMAZING potion rainbow!

Alka-seltzer rainbow of colors!

Our project

Special effect:

We created an amazing color-changing potion using the alka-seltzer rainbow lab! This could be used in a magic show to show color changing potions and the sublimation occurring.

Chemistry connection: When the alka-seltzer tablet is dropped into the distilled water, the carbon dioxide bubbles float to the top. This is sublimation! The sodium bicarbonate and citric acid react together to make carbonic acid and carbon dioxide. The acid reacts with the sodium hydroxide and then the solution will be more acidic and poof! The colors start to change!