Hooked on Science: Balloon Blow Up

Balloon Blow Up


  • Baking Soda
  • Vinegar
  • Balloon
  • Empty 2 Liter Bottle

STEP 1:  Fill the empty 2 liter bottle half of the way with the vinegar. Describe and classify the vinegar by its observable properties.

STEP 2:  Fill the balloon with baking soda. Describe and classify the baking soda by its observable properties.
STEP 3:  Carefully stretch the open end of the balloon around the neck of the 2 liter bottle.

STEP 4:  Dump the baking soda, inside the balloon, into the 2 liter bottle, and observe. Did mixing the two substances result in a new substance?


When the baking soda is mixed with the vinegar, a chemical reaction happens, which creates carbon dioxide gas. The carbon dioxide gas fills the balloon, causing the balloon to expand.

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