Dr. B’s Experiments and Demos: Blueberries in Acid and in Base (An example of a chemical indicator) (1:52)

Blueberries are a natural examples of a chemical indicator. They change colors depending on the pH of the solutions. In acidic solution blueberries, really the juice from blueberry skins, turns red. In a basic solution it will be green. Somewhere in-between, at a neutral pH it is a light purple