Place ¼ teaspoon of detergent and ¼ teaspoon of cream of tartar in their labeled cups. 1. Introduce the activity and guide the class in making a red cabbage indicator solution. Tell students that they ...

Show students the four liquids they will be working with: water, salt water, alcohol, and detergent solution. Tell students that since ... The water causes all of the color to spread away from the ...