- Tablespoon Baking soda
- Tablespoon Laundry Detergent
- 3/4 Cup Water
- 3/4 Cup Vinegar
- Several Drops of Food Coloring
- 12 Ounce Drinking Glass
- Waterproof Tray (Plastic or metal)
Place the drinking glass on the tray. Put the baking soda and laundry detergent in the glass. Add the water and a few drops of food coloring. Gently stir to mix the contents. Quickly pour the vinegar into the glass. The mixture will fizz and then foam up over the top of the glass covering the tray with a froth of tiny bubbles.
What's going on?
Baking soda, (sodium bicarbonate) and vinegar react. Vinegar contains acetic acid dissolved in water and sodium bicarbonate reacts with that acid. The products of that reaction are Carbon Dioxide gas, Sodium Acetate, and water. The cargon dioxide forms bubbles that are surrounded by the liquid. The laundry detergent makes the bubbles last longer and a foam is produced. The volume of gas produced and trapped in the foam is much greater thatn the glass can hold. Fizz...Foam...Froth...