Bubble Electrolysis.

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(D)Electricity and Magnetism - D+85: Electrolysis

Bubble Electrolysis Two carbon rods are submerged in water with a dilute solution of Sulfuric Acid. The rods are connected to a power supply set at 12V. The resulting Hydrogen and Oxygen are bubbled into a dish with bubble solution which can be ignited with a lighter. Braver presenters can do this demo in the palm of their hand if desired.
UCB Index: 
D+85+2
PIRA Index: 
5E20.15
Demo Diagram: 

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D+85+0 Electrolysis of water produces hydrogen and oxygen.
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E+5+0 Standard color blindness tests and box of colored yarns.