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Fizzy Bombs Science Activity| Fizzics Education

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Fizzy bath bombs

Fizzy bath bombs

Follow FizzicsEd 150 Science Experiments:

You Will Need:

  • A container
  • A spoon
  • ½ a cup of bicarbonate soda
  • Food colouring
  • Water
  • Muffin tray or ice cube tray.

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Fizzy Bombs Science Experiment - materials
1 Fizzy Bombs Science Experiment - mixed bicarb soda with food colouring

Pour bicarb soda into container, carefully mix in a few drops of food colouring at a time with a spoon until you get the desired colour. The mixture should be crumbly, and holds its shape when pressed with the spoon. If not, add a few drops of water and mix, repeat until it does.

2 Fizzy Bombs Science Experiment - put in muffin tray(1)

Fill the muffin tray or ice cube tray with the mixture, about 2/3 of the way up. Pack down with the back of the spoon.

3 Fizzy Bombs Science Experiment - Final result(1)

Leave to dry for an hour then turn out onto a plate.

4 Fizzy Bombs Science Experiment - Final result

Drip vinegar on top of the fizzy bomb or chuck one into a cup of vinegar!

5 Two smiling students watching a blue lava lamp made in a cup with oil, blue food colouring and alka seltzer
6 Teacher showing how to do an experiment outside to a group of kids.

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– Help students learn how science really works

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7 A man pointing at bubbling dry ice beaker and measuring cylinder with coloured liquids inside

Want to dive into acid-base chemistry?

Get the 30-minute video + PDF + curriculum links for your class here!

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What is the chemical reaction occurring here?

Vinegar + Bicarbonate Soda —> Carbonic Acid + Sodium Acetate

The carbonic acid is unstable though, so it breaks down into water and carbon dioxide forming the bubbles you see when the bicarb soda comes in contact with vinegar.

More vinegar and bicarbonate soda experiments here

Variables to test

More on variables here

  • Add bath crystals vs no bath crystals. Is the chemical reaction the same speed?
  • Is baking soda the same as bicarbonate soda?
  • Remove the food colouring from the recipe. Does the food colouring make any difference?

A man with a glove above a liquid nitrogen vapour cloud

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