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EXPERIMENT

Method
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  1. Prepare the materials according to the list above. 

  2. Add 100 mL of vinegar into conical flask A.

  3. Add 75mL of vinegar and 25mL of water into conical flask B.

  4. Add 50mL of vinegar and 50mL of water into conical flask C.

  5. Insert 10g of baking soda into three balloons.

  6. Place a balloon on each of the conical flasks, as shown in the image below.

  7. Lift all three balloons at the same time to pour the baking soda into the vinegar solutions.

  8. Observe the changes in the size of the balloons.

Materials

  • Vinegar 225mL

  • Baking soda 30g

  • Spatula

  • Glass watch 

  • Weighing scale 

  • 3 balloons

  • 3 conical flasks

  • Stopwatch/timer

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If you do not have these materials at home, here are some things you could use as a substitute:

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  • Glass bottles or plastic bottles if conical flasks are not available

  • Paper if glass watch is not available

  • Spoon if spatula is not available

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