Red Cabbage Litmus Paper Kitchen Science Experiment
In this fun and easy science experiment, we are going to go to the kitchen and learn how to make litmus paper with red cabbage.
Important: This experiment requires the assistance and supervision of an adult.
Materials:
- Jar
- Paper towels
- Head of red cabbage
- Grater
- Saucepan
- Strainer
Instructions:
- With the help of an adult, grate half of the head of red cabbage into the saucepan and add one cup of water.
- Boil for fifteen minutes.
- Let the juice cool.
- Strain out the cabbage from the cooled juice and pour the juice into the jar.
- Cut several strips of paper towel into two inch wide by four inch long strips.
- Soak the paper towel strips in the cabbage juice for about a minute.
- Remove the strips and let them dry completely.
- Your litmus paper will turn reddish-pink if something you test is an acid and green if something you test is an alkali.
- Try using you litmus paper to test the pH of things like milk, vinegar, and various fruit juices.
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How it Works:
The pigment in red cabbage has the ability to change color when exposed to acids and bases. This ability is know as an indicator since red cabbage can change colors when exposed to different chemical compositions.
Make This A Science Project:
Test the red cabbage litmus paper in different liquids. Test the same liquids at different temperatures to see if the chemical composition of the items being tested change in any way. Mix liquids and use your red cabbage litmus paper to test and see if there are any changes in pH.
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