Did you know that phosphoric acid is a colorless, odorless solution that comes from phosphate rock? It is only useful to your body as long as it maintains an equal ratio to calcium. When there's an abundance of it, it begins to eat away at your stomach. The calcium imbalance created by phosphate rock can lead to numerous health concerns like osteoporosis. Many soda pops contain phosphoric acid, and Coke is one of them. So what happens when you mix a source of calcium (milk) with Coke? A reaction like no other is created. The molecules in the phosphoric acid will attach to the molecules in the milk. Watch this experiment to see what happens next.