ok so students were doing some experiment and a gas was produced. they think the gas is hydrogen, how can they be sure?
does it turn back into water in contact with oxygen?
2007-03-23 03:07:07 · 6 answers · asked by ♥ hey! 2 in Education & Reference ➔ Homework Help
If there is a relatively small amount of gas produced, then the students can take a glowing wooden splint and place it near the gas. If the gas erupts into flames, then it was probably Hydrogen. (It is possible that it could be any flammable gas, but if the students have a hunch it is Hydrogen, then that is probably correct.)
It is kind of difficult to determine if a gas is Hydrogen, because Hydrogen reacts with most substances, so seeing if the gas will react with different objects will not give a very good indication of what the gas is.
Hydrogen does not become water when it comes into contact with Oxygen on its own. The elements would prefer to remain in their H2 and O2 molecules. However, if this happens in an electric field that is strong enough to ionize the molecular elements, then they will break apart and recombine into H2O, or water.
2007-03-23 03:16:10 · answer #1 · answered by saragon900 2 · 0⤊ 0⤋
With your theory in mind, fill an upside-down test tube with the gas then touch a flame to it. If it burns with a soft "pop" that is one clue. Hydrogen is flammable in air.
2007-03-23 10:16:06 · answer #2 · answered by steve.c_50 6 · 0⤊ 1⤋
contain the gas in a test tube and try lighting a match or anything and if you hear a *pop* (be it loud or faint), its hydrogen..my dear.. the element doesn't turn back to water that easy..it requires much electric energy..
2007-03-23 10:15:42 · answer #3 · answered by reinharudo 2 · 0⤊ 1⤋
hydrogen pops when it comes into contact with fire or a burning splint.
2007-03-23 10:14:49 · answer #4 · answered by no_one_knows 2 · 0⤊ 1⤋
no, it does turn back
It is Hydrogen coz it can see through
2007-03-23 11:32:26 · answer #5 · answered by Ghost 2 · 0⤊ 0⤋
is it lighter than air?
2007-03-23 10:20:36 · answer #6 · answered by Stroescu T 2 · 0⤊ 0⤋