can hydrogen gas be extracted from water?

Answer 1

yes its very easy.just put 2 live electrodes (one live,one neutral) at a very short distance in the water and ,you get Hydrogen as well as Oxygen.

Answer 2

Hydrogen may also be extracted from water via biological production in a algae bioreactor, or using huge amounts of electricity (by electrolysis) or heat (by thermolysis).

Biological hydrogen production is done in a bioreactor based on the production of hydrogen by algae. Algae produces hydrogens under certain conditions. In the late 1990's it was discovered that if algae is deprived of sulfur it will switch from the production of oxygen, i.e. normal photosynthesis, to the production of hydrogen.

Electrolysis is a method of separating bonded elements and compounds by passing an electric current through them.

Thermolysis (from thermo- meaning heat and -lysis meaning break down) is a chemical process by which a substance is decomposed into other substances by use of heat.

Answer 3

Yes, it can.
The classic way to do it is to pass direct electric current through water. You cannot use electricity from the mains, as this is alternating current. You'd have to use something like a car battery. The water is then split into hydrogen gas and oxygen gas, with the hydrogen collecting around the cathode and the oxygen around the anode:
2 H2O(l) ---> 2 H2(g) + O2(g)

Another way to do it is to use a metal that is more electropositive than hydrogen, such as sodium (a bit dangerous), calcium or even iron. To get hydrogen using iron, you would have to pass steam over red-hot iron filings:
4 H2O(g) + 3 Fe(s) ---> 4 H2(g) + Fe3O4(s)

An even smarter way would be to use a metal hydride, such as sodium hydride: that way, you would produce hydrogen not just from the water, but from the sodium hydride as well:
NaH(s) + H2O(l) ---> Na+(aq) + OH-(aq) + H2(g)

Allan Deeds.

Answer 4

always, the main element in water is hydrogen. this means that with the correct current the molecule will split into oxygen and hydrogen both as a gas.

Answer 5

Of course yes. By adding acid and making electrolysis on water, ya get both OH (Hydroxide) and H (Hydrogen).
If ya donno Electrolysis, it is the separation of a substance (Usually: Ions) by Electricity. You can get it by making a circuit with Anode(+) and Cathode(-) bars put in a solution or melted substance. Now, The + part of the ion ( or sometimes Hydrogen, let's not go too deep) goes to the cathode, while the positive to the anode.

Answer 6

Yes. Thru chemical reaction. Take sodium hydroxide (Lewis lye) dissolve in water and add aluminum. The container will heat up so it should be placed in a water bath. Be careful as the free hydrogen is explosive around static and open flames.

Answer 7

Yes you can - in the manners described by your previous answers. But may I (perhaps wrongly!) anticipate your line of thought? If your idea is to use hydrogen as a pollution-free fuel, there is one insurmountable obstacle: the process of making hydrogen will absorb much more energy than it will deliver if burned. Since the energy absorbed by production of hydrogen (electricity?) is presumably obtained by burning a standard polluting fuel, we would end up worse off than ever!

Answer 8

yes, by electrolysis.
Infact, you get bonus stuff as well. Oxygen.
If you pass a current through an anode and a cathode, which are immersed in water, you get bubbles of hydrogen coming off one, and bubbles of oxygen coming off the other one.

Answer 9

ya. in all the ways suggested earlier.
Commercially it's being done thru the chemical route at a few plants in India.

However, the thermal, electrolytic and chemical processes are not so cost or energy effective if one is planning to do it on a Large scale- ie, use it as a fuel in automobiles, industry, et al.

Ways and means need to be designed to do it on a biological level- thru use of algae- as suggested in an earlier answer to your question.

Answer 10

Through Hydrolysis of water, Hydrgen Gas can be evolved