Cabbage Juice Litmus Test

Materials

1. Pre-prepared purple cabbage juice (can be made at home the night before with a blender and a strainer.
2. Cups or egg cartons to hold liquids
3. Lemon juice
4. Vinegar
5. Bleach- based cleaning product
6. Selection of other foods (soda, baking soda, egg whites, tomato juice)

Students can experiment with adding cabbage juice different liquids to determine their pH. They can create a scale of the materials from most acidic to most basic. 

Article: https://www.scientificamerican.com/article/bring-science-home-cabbage-chemistry/