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Colour Changing Magic Potion

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How fun was this colour changing magic potion experiment! The more you make the bigger your potion! Be warned! This can make a mess, so it is best to do outdoors or in a large tray.

 Colour Changing Magic Potion

To make this colour changing magic potion, you will need:

  • Red cabbage
  • Knife
  • Saucepan
  • Water
  • Colander
  • 2 clear jars / glasses
  • 1 heaped teaspoon bi-carb (baking) soda
  • 3 TBSP white vinegar

Chop the red cabbage into small pieces, place in a saucepan, cover with water and boil for 15 minutes. (An adult should be present for this)

Remove from heat and let cool, then drain the purple juice into a bowl.

Add about ¼ cup of the cold purple juice to each of the jars /glasses.

Colour Changing Magic Potion 1

To one of the jars, slowly add the bi-carb (baking) soda and watch it change colour.

 Colour Changing Magic Potion 3

To the other jar, slowly pour in the white vinegar, watching as this also changes colour.

 Colour Changing Magic Potion 5

Then, (this is the messy part) to make the magic potion erupt, slowly pour the jar with the juice and white vinegar into the jar with the juice and bi-carb soda.

Colour Changing Magic Potion 7

 Colour Changing Magic Potion 8

Colour Changing Magic Potion 9

How does this work?

Pigments give things colour. The pigments in the cabbage juice change shape and absorb light when they are exposed to an acid or a base. Vinegar is an acid and turns the potion pink whereas bi-carb soda is a base and turns the potion bluish-green.

When you mix the vinegar and bi-carb soda mixes together, a chemical reaction takes place. A product called carbon dioxide is produced and causes the potion to foam up.

Category: Homeschooling, Kids ActivitiesTag: Experiments, Grade 1, Grade 2, Grade 3, Kindergarten, PreK, Preschool, Science

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