Inspired by this. We thought of having fun with things found in our kitchen.
Making a liquid indicator that helps us to figure out which food, drinks or detergents are acids or alkalis.
1...Cut the red cabbage into tiny pieces.
2...Put the pieces into a big glass bowl.
3...Add boiling water and stir the mixture.
4...Leave it to cool.
5...Pour the cabbage water through a strainer into a jar.
The liquid is the indicator.
We started the test with lemonade and baking soda.
Lemonade turned the indicator reddish pink, indicating it's an acid.
Baking soda turned the indicator into a beautiful blue green, indicating it's an alkali.
We tried with things iza shortlisted : Lemon, baking soda, honey, chicken broth, milk, soya source, cod liver oil, vinegar, shampoo, glass cleaner and water ( can be anything provided it's safe ).
Watch the color changes. You will know which is acid or alkali.
When you mix the liquids with baking soda and lemonade (or vinegar) together, you will see furious bubbles. If we mix the right amount of acid and alkali, they will cancel out each other and make a neutral (salt) again. But we didn't get the right balance :)