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Here's a quick cheap way to get some hydrogen and oxygen.
You will need 2 pencils,a cup,some cardboard,salt,a 9-volt battery,a 9-volt battery connected, and a pencil sharpener.
Sharpen both ends of both of your pencils.Try to have the graphite in the pencil as long as you can.Then cut the cardboard so it comfortably fits on t...
Fill the cup half full with warm water, Mix about 1 teaspoon of salt into the water.Then wrap some of the wire around one end of both the pencils. Att...
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then you add some dish soap to the water, and watch flammable bubbles form.
The Bubbles are Hydrogen and Oxygen. If you can collect them from each pen seperatly by using pvc-tubes, you can use them for other experiments. e.g. hydrogen has a lower density then air, a balloon would float if it was filled with H.
ps: oxygen will appear at the positive lead, negative leads to Hydrogen.
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