IProposeWe Make Hydrogen Bubbles

Links:

• How to Make Hydrogen Bubbles
• More Hydrogen Experiments

Materials: Test Tube, Vinegar, Long Iron Nail, Sand Paper

Procedure:

1. Pour about one inch of vinegar into your test tube then secure the test tube on a rack.
2. Using your sandpaper, sand the tip of the nail.
3. Place the nail into the vinegar with the sanded side down.

Safety Precautions:

• Do not use the sand paper against the surface of your skin.
• Keep the iron nail away from your face.

Scientific Principles:

• Vinegar is an acetate acid that reacts with iron.
• The vinegar dissolves the iron into the solution releasing hydrogen.

David Webb

So David Webb came to our class and gave a pretty cool presentation on pressure. He showed us examples of different units to measure pressure then showed us what different things pressure can do to an object. One of the most interesting examples he showed us was one about a balloon. He set a regular balloon in a sealed vacuum chamber and slowly the balloon just got bigger. It made no sense to me really but after a minute or two, the balloon was twice its size! It was crazy! Other than that, David Webb did other experiments using pressure. In the end, it was a very interesting presentation. One example he gave us that I myself tried was the one about filling a cup up with water then using a card, placing it on top of the cup, then flipping it over and watching the cup filled with water just keep the water there. I was successful :D