The process of splitting water H2O into its atomic components hydrogen and oxygen using electricity is known as electrolysis. Here is how to do it.
1 Fill a glass
about 3 in./7.5cm diameter about 3/4 full of tap water.
2 Dissolve a teaspoon of table salt in the water.
Salt helps conduct electricity better through the water.
3 Place a thin piece of cardboard a paper plate will work over the opening of the glass.
Poke two thin electrical wires, approximately 1-2 feet/30-60cm long, through the cardboard about 2 inches/5cm apart so that one end of the wire is approximately 2-3 inches/5-7cm submerged in the water.
4 Wrap the other ends of the wires around the positive and negative terminals of a nine-volt battery.
Bubbles will soon begin to form on the submerged ends of the wires, hydrogen gas on negative wire and oxygen on the positive wire.
5 To produce sizable amounts of hydrogen or oxygen
Discretion is advised, continue following these steps otherwise, you are finished at Step You will require, in addition to the previously stated items, a smaller container a syringe is best and something with which to suspend the smaller container upside down tape works adequately.
6 Submerge the smaller container in the larger glass
without removing the glass from the water; or, bringing the opening above the water level of the big glass, flip the smaller glass so that the opening faces toward the bottom of the larger glass. If using a syringe, simply put the opening into the glass and pull the plunger, filling the syringe with water, and skip to Step 9.
7 Bring the smaller glasses opening toward the water surface, but, again, be careful not to let the opening come out of the water.
If done correctly, the smaller glass should protrude from the water surface, but it will be filled with water it is being suspended by pressure.
8 Suspend the smaller glass in this position with the clamp/tape/etc.
9 Insert the HYDROGEN negative or OXYGEN positive wire into the underwater opening of the smaller container.
10 Leave it until the smaller container is full.