What happens when you mix Coca-Cola and milk?
In this fascinating YouTube video, watch what happens when milk is added to a bottle of Coke. After an hour, the liquid in the bottle appears to become clear, as brown sediment sinks to the bottom.
So how exactly is this “invisible soda” created?
Per the blog of Steve Spangler Science, a science gadgets and experiments website:
The separation happens because of a reaction between phosphoric acid and milk. Phosphoric acid molecules attach to the molecules of milk, increasing the density and separating them from the rest of the liquid. The remaining liquids, having less density than the phosphoric acid and milk molecules, floats on top.
The video of the experiment was first posted on YouTube in January, but has experienced a viral resurgence this week. It has been viewed more than 3.8 million times to date.