What does a balloon do with vinegar and baking soda in it?

The chemical reaction that takes place is:

```

NaHCO3 + CH3COOH → CO2 + H2O + CH3COONa

```

In this reaction, sodium bicarbonate (NaHCO3) and acetic acid (CH3COOH) react to produce carbon dioxide gas (CO2), water (H2O), and sodium acetate (CH3COONa).

The carbon dioxide gas is what causes the balloon to inflate. As more and more gas is produced, the balloon will continue to inflate until it eventually bursts.

This experiment is a fun and easy way to demonstrate a chemical reaction. It can also be used to teach children about the properties of gases.