Description
Use red cabbage juice to test household liquids for acidity, revealing vibrant color changes, sparking an aha-effect as kids discover pH indicators.
Details
1. Boil red cabbage leaves in water for 10 minutes, then strain to collect purple juice.
2. Pour juice into several clear cups (1/4 cup each).
3. Add a teaspoon of different liquids (e.g., vinegar, baking soda solution, lemon juice) to each cup.
4. Observe the juice change colors (pink for acids, green/blue for bases).
5. Record which liquids are acidic or basic.
6. Discuss how cabbage juice indicates pH levels.
Materials
Red cabbage, water, pot, strainer, clear cups, vinegar, baking soda, lemon juice