- 1 Head Red Cabbage
- Lemon Juice
- Baking Soda
- Epsom Salt
1.) Boil the red cabbage until the water turns a blue-ish. (This takes all of the color out of the cabbage)
2.) Let the cabbage juice cool. (This juice is best used fresh, after about 3 days the juice doesn't work as well for this experiment.)
3.) Pour a little bit of cabbage juice into 7 test tubes.
4.) In each test tube add a little of each item. (So in one tube add some aspirin and baking soda in another.)
Leave the last test tube empty as a control.
5.) Compare the colors in each tube. The tube with lemon juice should be a distinct pink color while the baking soda is a blue-green color.
The acids in this experiment will turn a pink or light purple color while the bases will be blue-green.
You can use the red cabbage juice to find out if other things in your house are acidic or basic too! Go try some soap, apple juice, or even a little of that soup you had for dinner!