Home Science: Make a colour changing magic potion!

These colour changing molecules can be changed from indigo to brilliant blue or bright pink with a few simple experiments!

Pigments are molecules that contain colour and the ones in red cabbage juice ( anthocyanin ) are pretty special. By adding a base or acid, we can both change their shape and their colour! The pigments are easy to collect and the basis for two easy home experiments: Colour Changing Magic Potions and Making Litmus Paper.

First, you will need to collect some magic molecules from a red cabbage: click here to find out how.

Materials

Change your purple cabbage juice to blue by adding a base and to red/pink by adding an acid.

Directions

  1. Pour your prepared red cabbage juice into two clear glasses or small bowls.
  2. Into one glass, stir 1 tsp of baking soda. Watch the solution turn blue – indicating that the pH has turned basic.
  3. Into the second glass, stir 3 Tbsp of white vinegar. Watch the solution turn red/pink – indicating that the pH has turned acidic.
  4. For fun, pour the glass containing vinegar into the glass containing baking soda and watch them foam! Tip: for less mess, pour both solutions into a big bowl!
Foaming magic potion fun!

2 thoughts on “Home Science: Make a colour changing magic potion!

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s