I’ve got lots of fun heart and flower themed experiments for Valentine’s Day in our Valentine Science Experiment round up post from a few years ago. New for this year are our colour changing potions for Valentine’s Day. All you need to make these is water, a red cabbage and some acids.
Red Cabbage Indicator turns pink in the presence of acids, so by testing different types of acids ( lemon juice and vinegar are good to try ) you can make a range of lovely pink potions!
If pink isn’t your thing add an alkali ( Baking Soda works well ) and turn the indicator a more dirty green colour!
Pink Colour Changing Potions
Red Cabbage – chopped
Large container for the indicator
Small containers for the testing
Acids to test – vinegar, orange juice, lemon jucie
How to make a Valentine potion
Place the red cabbage into the pan and cover with water. Bring to the boil ( ask an adult to help ) and leave to simmer for 5-10 minutes.
Leave to cool and then pour the mixture through a sieve or colander saving the purple cabbage water.
Share the indicator mixture between the small containers and add a little of the test acids ( only use edible acids to test ) to see how the indicator changes colour.
Once you’ve made lots of lovely pink colours, add a little baking soda to make the potion fizz.
The alkaline baking soda reacts with the vinegar to make a lovely fizzy mixture. This is a n example of a neutralisation reaction.
If you enjoyed this experiment we’ve got lots more baking soda experiments for you to try.
More Potions for Valentine’s Day
This layered love potion from Playdough to Plato is gorgeous too.
Babble Dabble Do has a brilliant kool aid based Harry Potter potion as well!
We don’t know which to try first!