H2O - O = H2 + O how do i do this?

Question

i want to separate hydrogen and oxygen in water so i can use it for small rocket projects and vehicular fuel

if not separating water molecules then what could i separate that has hydrogen in it and how

Answer 1

Water can be separated into hydrogen and oxygen gas through a process called electrolysis.

In electrolysis, an electric current is passed through water between two electrodes called the cathode and the anode. Electrons move from the cathode to the hydrogen atoms, separating them from the oxygen atoms and converting them into a gaseous state. This generates hydrogen gas at the surface of the cathode. Similarly at the anode, electrons are removed, resulting in the formation of gaseous oxygen on the anode's surface. As expected, the number of hydrogen molecules produced will be twice the number of oxygen molecules.

http://www.instructables.com/id/Separate...

Answer 2

All you have to do is apply electricity... the problem is that the energy it takes to split the molecule is greater than the energy you'll get from burning the hydrogen.

This is the reason that hydrogen fuel cells will remain a fantasy... there is no source of free hydrogen on this planet and anywhere you find hydrogen, it takes too much energy to split it out.  There is some possibility that a catalyst may be discovered that facilitates the separation of water, but I wouldn't hold my breath.