Crazy Chalk Chemical Reaction Science Experiment
In this fun and easy science experiment, we’re going to explore and investigate endothermic chemical reactions by mixing chalk and vinegar.
- Colored chalk
- Zip close baggie
- Clear plastic cup
- Put at least two different colors of chalk in the zip close baggie.
- Use the hammer to carefully smash the chalk into dust.
- Fill the clear plastic cup about ¾ of the way full with vinegar.
- Put about a tablespoon of the colored chalk dust into the vinegar and observe what happens.
How it Works:
You may not have realized that regular old chalk fizzes and bubbles when mixed with vinegar. Chalk is made of calcium carbonate and when mixed with vinegar an endothermic chemical reaction occurs that releases carbon dioxide gas. This gas is what causes the fizzing and bubbles.
Make This A Science Project:
Find a location that can get messy. Put the chalk dust in a new baggie. Add vinegar, seal the baggie securely, and observe what happens. Test different types and brands of chalk to see if there are any observable differences.