Testing for acids and bases usually requires universal indicator or litmus which isn’t exactly a common home material. This experiment will show you how to make an indicator with nothing but red cabbage and tap water.
Chop up red cabbage into small chunks and place them into a pot of boiling water. Soluble flavin will dissolve into the water giving it a deep purple/red colour. Allow to cool and pour off this solution.
DONE! Easy wasn’t it?
You can test it on a variety of house cold chemicals to see their acidity. Strong acids will be red, weak acids purplish red, neutral is purple, weak alkaline is blue and strong alkaline is green.
Suggestions on acidic and alkaline chemicals to test:
- Lemon juice
- Oven cleaner
- Washing soda
- White vinegar
- Antacid tablets
- Carbonated water