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Home » Science Experiments for Kids » Chemistry » Red Cabbage Indicator Colour Changing Potions

Red Cabbage Indicator Colour Changing Potions

Modified: Feb 13, 2020 · Published: Jun 30, 2018 by Emma Vanstone · This post may contain affiliate links · 3 Comments

These red cabbage indicator colour changing potions are fantastic fun for kids of all ages and very easy to create. We used red cabbage indicator and added different amounts of baking soda ( an alkali ) and vinegar ( an acid ) to make the different colours.

What is a pH Indicator?

A  is a substance which has one colour when added to an  and a different colour when added to an .

Acids have a low pH and bases a high pH.

Why does red cabbage make a good indicator?

Red cabbage contains a chemical called anthocyanin. This changes colour depending on the acidity of its environment. It turns a pink/red colour in the presence of an acid, is purple when neutral and when added to an alkaline substance turns blue or green.

How to make Colour Changing Potions

Red Cabbage Indicator Ingredients

Red Cabbage ( chopped )

A pan

Water

A stove

Strainer

Selection of jugs, jars and beakers

Vinegar

Dish soap ( washing up liquid )

Lots of different colour potions made using red cabbage indicator #scienceforkids #chemistryforkids

Instructions

Place your chopped red cabbage into a pan, cover with water and heat until the water turns purple ( ask an adult to help )

Carefully pour the mixture through a strainer to remove the red cabbage and collect the solution in a container.

Pour the indicator into smaller beakers, it doesn’t really matter how much you use, but we made ours about half full.

Add different amounts of baking soda or vinegar to each one.

How many different colours can you make?

Red cabbage indicator challenge - how many different colours can you make? - Fun science experiment for kids

Colour Changing Potions Challenge

For a little extra fun, you can add vineger to a beaker containing baking soda and vice versa to see a fizzy colour changing reaction.

red cabbage indicator fizzing potions
colour changing potions made with red cabbage indicator and made to fizz with baking soda

Safety note

Wear safety goggles if using strong acids/bases.

An adult should help with the chopping and heating of the cabbage.

red cabbage indicator colour changing potions

More Red Cabbage Indicator Ideas

We love how The Science Kiddo froze some red cabbage indicator to test different substances

Make your own pH indicator test strips

colour Changing Potions made with red cabbage indicator. Make red cabbage indicator and add different acids and alkalis to make different colours. #chemistryforkids

Last Updated on February 13, 2020 by Emma Vanstone

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Safety Notice

Science Sparks ( Wild Sparks Enterprises Ltd ) are not liable for the actions of activity of any person who uses the information in this resource or in any of the suggested further resources. Science Sparks assume no liability with regard to injuries or damage to property that may occur as a result of using the information and carrying out the practical activities contained in this resource or in any of the suggested further resources.

These activities are designed to be carried out by children working with a parent, guardian or other appropriate adult. The adult involved is fully responsible for ensuring that the activities are carried out safely.

Reader Interactions

Comments

  1. Katie A

    June 06, 2019 at 1:37 am

    Hi! I was wondering if you mixed the colors together? I am trying every where to find mixing colors for a Harry Potter themed gender reveal and I cannot figure this out. Can you help?

    Reply
  2. Niels Bouwhuis

    November 29, 2020 at 8:51 pm

    So why do you need the dishwash liquid? That’s not explained

    Reply
    • Emma Vanstone

      December 01, 2020 at 5:25 pm

      Hello, the washing up liquid is to help the mixture foam up better.

      Reply

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