Baking Soda and Vinegar Balloon Experiment


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Baking Soda and Vinegar Balloon Experiment

Baking Soda and Vinegar Balloon Experiment



To identify the objects that are solid, liquid, or gas

To observe and talk about how the balloon is blown up when baking soda and vinegar are mixed




baking soda







Lesson Proper:

Brief Introduction of solid, liquid and gas and materials to be used.

What are solids? 

Solids are objects like books, box, pencil, chair, stone,table etc.

What can you say about these things? Can you see them? touch? Does it have a shape of its own? Does it have weight?

How about water? Objects like water, oil, milk, vinegar, juice etc... Does it have a definite shape? 

How about gas? Gas is everywhere like air. Can we see it? touch? Does it have a shape of its own?

We will do an experiment with gas. These things can change if something is done. We will see the power of gas when we mix these things. 


1 Fill each balloon with baking soda using the funnel ( This is a partner activity; one person to hold the balloon open and the other person to put the baking soda inside of the balloon).

2 Fill the bottle with the vinegar.

3. Attach the balloon over the bottle opening with care (be careful not to drop the baking soda into the vinegar yet).

4. Hold the balloon up and let the baking soda fall into the vinegar once it has been snugly attached to the nozzle.

5  Observe what will happen to the balloon when baking soda and vinegar are mixed and see how the chemical reaction affects it.

6.  Make a Guess and Record observations  ( Circle your answer)


I think…








The bottle will get hot


 The balloon will get bigger.


Nothing will happen.



My guess was correct:                   YES                NO



Conclusion: (What I learnt)  What made the balloon bigger? (Inflate)

A.  because of the bottle





B: because of the bubbles/gas from vinegar and baking soda mixed




Questions for Discussion:

1. What happened when baking soda and vinegar are mixed?

2. What do you think will happen to the balloon? 

3. Why did the balloon stop blowing up?



There is an acid-base reaction when vinegar and baking soda are together. Baking soda is the base, and vinegar is the acid. A gas called carbon dioxide bubbles and foams  are created as a result of this reaction between the two. Due to the great speed of their particles moving in all directions, gases expand quickly.



When the carbon dioxide gas has nowhere else to go as it fills the bottle, it starts to fill the balloon. The balloon expands, causing it to self-inflate. as the carbon dioxide gas fills it. 






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