Experiment W29:
Oxyhydrogen gas
from water
*  Fill a 5 -ml vial with tap water.
* Close it by a rubber stopper.
* Unpack a thick injection needle, puncture the stopper with the needle.
* press the stopper firmly into the vial,
* fixs a second needle into the stopper.
* Connect the needles with a 9-Volt battery:

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At the left needle (-) more gas is formed than at the right one (Left photo).
(If there is not enough gas your water is too soft: Take soda water).
*  Right photo: Fill soap water into the cavities of a blister packing.
*  Suck the gas from the vial into a syringe.
*  Make soap bubbles in the soap water and light them.

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The gas makes a bang: It is a mixture of hydrogen (H) and oxgen (O) obtained from water by its chemical reaction at the two injection needles supplied with electricity..
About water molecules and hydrogen atoms:              Experiment W30                     home