red cabbage indicator

 aim 

• 1 head of red cabbage
• Sharp knife
• Pot to boil water in (or blender)
• Strainer or colander
• Glass bowl
• clear cups or glasses
• household liquids to test (vinegar, baking soda, juices, soaps, bleach, ammonia, and anything else you want!)
• Something to stir with

 

1. Take your red cabbage and have an adult help you cut off about 2-3 cups (the amount doesn’t need to be exact, the more cabbage, the more indicator you will get).
2. Have an adult boil a pot of water and place the cabbage pieces in. Bring the water back to a boil for a couple minutes. Turn heat off and let sit for at least 10 minutes. Again, there’s no magic number, you just want the water to be a reddish-purple color. (You can also place the cabbage in a blender with water).
3. Strain the water out into a glass bowl and let cool.
4. Once it has cooled, pour some into clear cups or glasses and add different liquids to test. 
5. Gently stir or swirl the solution and see what happens!

(Be careful about mixing household cleaners together, as some combinations may produce harmful fumes. Only test one substance at a time.)