Prepare for 6 Groups
- Pans or Bowls
- Baking Soda Pouches (1 rounded tbsp baking soda, in a piece of single ply toilet paper)
- 1 quart vinegar (1/4 cup or 75mL per group)
- 1/3 cup measuring cups or 25mL graduated cylinders
- Ziploc sandwich bags
- To make baking soda pouch (prep ahead or have one teammate do this – Teammate #5, depending on age group): Measure 1 rounded tablespoon of baking soda into a square of single ply toilet paper. Fold horizontally and secure with a small piece of tape, then fold vertically and wrap it all the way around with a large piece of tape, ensuring it will stay closed. Make 1 per group.
- Break students into 4-6 groups, ideally 4 to a group so everyone has a job, depending on class size.
- 1 pan/bowl
- 1 sandwich bag
- 1/3 cup measuring cup or 25mL graduated cylinder
- 1 baking soda pouch
- Open bag slightly, allow empty portion to hang over edge of pan and add baking soda pouch so that it does not touch vinegar
- #1 zip bag shut without mixing chemical yet
- Teammate #4 lift bag, allowing chemicals to mix. Shake 3 times, place in pan/bowl and observe what happens!
How It Works:
When the baking soda and vinegar mix, it results in a chemical reaction that produces carbon dioxide (CO2) along with water (H2O) and sodium acetate. If the bag is properly sealed, the carbon dioxide is trapped and fills the bag until it cannot hold any more, at which point it pops!