Try This at Home: Chameleon Jelly
Chemical indicators are clues that a chemical reaction has taken place. One example of a chemical indicator is color change.
What You Need
- 1 small clear plastic container
- 1 spoon
- 15 mL (1 tablespoon) grape jelly
- 100 mL (1/2 cup) warm water
- 5/8 mL (1/8 teaspoon) baking soda
- 15 mL (1 tablespoon) vinegar
What To Do
- Make sure you have an adult with you to supervise this experiment.
- Put the jelly and water into the container. Stir to dissolve the jelly. What color is the solution?
- Add the baking soda to the solution and stir. Observe what happens.
- Add the vinegar to the solution and stir. Observe what happens. It may help to see to hold the solution up to light.
- How did you know when a chemical reaction took place?
- Clean up.
Color change is one way to tell when a chemical reaction occurs. The purple jelly solution undergoes a reaction when you add the baking soda. The evidence of this reaction is the color change and the production of a gas. When vinegar is added, another chemical reaction happens, accompanied by another color change.
Fireflies glow due to bioluminescence, an exothermic chemical reaction that gives off light but not heat.