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The Acid Test

The Acid Test

You can make your own cabbage juice indicator!




Have an adult help you with this!

Chop some purple cabbage into small pieces. Put it into a pot with 2 cups of water, and bring it to a boil on the stove. Reduce the heat, and let it simmer for 10 minutes.

The water will turn purplish. Remove the pot from the heat. Allow the liquid to cool. Strain the cabbage, and pour the liquid into a jar.

The cabbage juice can be used to tell if chemicals are acids or bases! The color of purple cabbage changes in response to acids or bases.

Place a few drops of your cabbage indicator onto small samples of the substances on the list. The liquid will turn pink in the presence of acid. It will turn green or blue in the presence of base substances.

Record your results in a chart like the one you see here! Test each substance with cabbage juice. Tell what color the indicator became, and check each one “acid” or “base".

Add some other substances to your chart and give them “The Acid Test!”