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Cool Experiments To Try
Cabbage & Chem-eleon Chemistry!
1) Make your own red cabbage pH indicator.
- Chop the cabbage into small pieces until you have about 2 cups of chopped cabbage. Place the cabbage in a large beaker or other glass container and add boiling water to cover the cabbage. Allow at least ten minutes for the color to leach out of the cabbage. (Alternatively, you can place about 2 cups of cabbage in a blender, cover it with boiling water, and blend it.)
- Filter out the plant material to obtain a red-purple-bluish colored liquid. This liquid is at about pH 7. (The exact color you get depends on the pH of the water.)
- Pour about 50 - 100 mL of your red cabbage indicator into each 250 mL beaker.
- Add various household solutions to your indicator until a color change is obtained. Use separate containers for each household solution - you don't want to mix chemicals that don't go well together!
2) Make a chem-eleon!
- Paint your cabbage indicator on a drawing of a chameleon and let it dry. Then paint on with acidic or basic liquids to create patterns.
- Try lemon juice for a safe acid, and dissolved antacid for a safe base with younger students.
Experiment samples with template and completed painting:
Websites we Love!
NASA's Space Place Newsletter - Free resources on the Space Place website that can be helpful for kids and grown-ups interested learning about science, technology, and space.
All About Chocolate from The Field Museum in Chicago - Use the enticing subject of chocolate to teach your class about the intriguing relationship between nature and culture.