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Do you know what color red cabbage is? Did you know that the color can change? Do
you know why cabbage changes color in ocean water but stays the same color in
tap water? Learn more about the
chemicals in cabbage and make a memorable picture of your experience at Science
In this activity, visitors ‘paint’ on a sheet of rice paper
colored by cabbage juice. The paper
appears red but changes to blue, green, or yellow when the cabbage is exposed
to substances like soap, baking soda, vinegar, or lemon juice. The color of
cabbage depends on the substances it comes in contact with. Cabbage juice
contains a chemical molecule called an indicator. Indicators change colors in
acid and base solutions. An acid is a molecule that produces an excess of
hydrogen ions in solution. Vinegar is an acid, cabbage juice turns pink in the
presence of an acid. In baking soda, cabbage juice turns green.
can do this experiment at home using the instructions below.
You can find acids and bases in your house by making your
own cabbage juice paint. To make the paint use the following steps.
Things you can test at home:
Lemon juice, milk, baking soda, cream of tarter, vinegar,
wine, coffee, tea, soap.
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