A basic experiment with hydrogen electrolysis can be demonstrated very simply with a glass, salt water, two pencils sharpened on both ends to expose the graphite, a 9 volt battery, two alligator clips.
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CAUTION! Do not breathe the fumes or place your face by the water. Don't drink the water either. Just use common sense of observing and taking notes from a distance for your safety!
Pour water into the glass. Place a little salt or baking soda in the water and stir. Place both pencils in the water in a vertical manner. Attach the ends of the alligator clips onto the tops of the pencils. Attach the other ends of the alligator clips onto the 9 volt battery terminals.
This is a basic experiment that you should be able to do safely at home. But, be very careful. If in doubt ask your science teacher or parent if you are not sure about doing this safely. Safety is the utmost importance.
Have fun and write down what you learn!
At the end of the day, Making-Hydrogen.com is about how to create hydrogen from solar power to bacteria! What is the coolest way you have discovered in making hydrogen?