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How could a sample of gas be collected at the positive electrode?
Wiki User
∙ 11y ago
Assuming that you are talking about a battery, you could use a 9V battery, 2 pencils (sharpened on both ends), a bowel, some Blu
Tack (or any other adhesive) and 2 cups. You fill the bowel with water, enough to submerge the cups, and stick the battery to the side of the bowel. You take the cups and lay them sideways in the bowel, the water should fill the cups completely, if not then add more water. Once they are filled you turn them other so that they are upside down in the bowel. Stick the 2, double end sharpened pencils to the cathode (positive) and anode (negative). Submerse the pencils in the water and quickly put the cups over the pencils, make sure that the cups are still in the water. If you have done this correctly, you should be collecting gas!
Because you filled the cups with water, and the gas is less dense, the gas will travel up to the top of the cup and will push the water out of the cup!
Wiki User
∙ 11y ago
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