How to Inflate Balloon with Vinegar and Baking Soda

Inflating balloon with vinegar and baking soda is a classic experiment. Perform this experiments with friends and explain them what is happening. You can perform this experiments with materials from your kitchen. In this experiment you will learn you will learn how gas (carbon dioxide) produced from chemical reaction inflates the balloon.

Required Materials

  • One Empty Plastic Bottle
  • Half Cup of Vinegar
  • A Balloon
  • 2 to 3 Spoons of Baking Soda
  • Water

What To Do

  1. Pour the ½ cup of vinegar and ¼ cup of water in the plastic bottle.
  2. Inflate and deflate the balloon with your mouth 2 times to loosen it. Pour 2 spoonful of baking soda in the balloon using funnel (If you don’t have funnel than you can make one from paper and scotch tap).
  3. Stretch open the mouth of the balloon and carefully put it over the neck of the plastic bottle. Let the end of the balloon dangle to prevent the baking soda from falling into the bottle.
    Balloon with baking soda
  4. Hold the mouth of balloon tightly on neck of the bottle and hold the other end of balloon up so that all the baking soda goes into the bottle.

Observe the inflating balloon and chemical reaction.

inflating balloon


When Baking soda is added to vinegar, an acid-base reaction takes place. In this reaction carbon dioxide gas is produces which develops pressure in the bottle and starts to inflate the balloon that means your balloon is full of carbon dioxide gas so it won’t float in the air because carbon dioxide is heavier than air. Adding water in the bottle dilutes vinegar and slows down rate of reaction.

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