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Energy from Natural Resources => Electrolysis of H20 and Hydrogen on demand generation => Topic started by: CrazyEwok on April 20, 2009, 03:33:18 AM

Title: Is there a Chemistry nutt here?
Post by: CrazyEwok on April 20, 2009, 03:33:18 AM
I have a few questions that i am hoping someone with a chemistry background can answer for me.
1. if you run pure hydrogen gas through water does some of the hydrogen mix with the water? seems unlikely...
2. Is there some way to improve the amount of Oxygen absorbed by water to turn it into H2O2?

It would be a great help if you could answer this for me please.
Title: Re: Is there a Chemistry nutt here?
Post by: pese on April 20, 2009, 09:29:48 AM
ask -resinrat- by messy
he is specialized to that kind of asks
Pese
Title: Re: Is there a Chemistry nutt here?
Post by: Paul-R on April 20, 2009, 10:10:20 AM
Quote from: CrazyEwok on April 20, 2009, 03:33:18 AM
I have a few questions that i am hoping someone with a chemistry background can answer for me.
1. if you run pure hydrogen gas through water does some of the hydrogen mix with the water? seems unlikely...
2. Is there some way to improve the amount of Oxygen absorbed by water to turn it into H2O2?

It would be a great help if you could answer this for me please.
1. If you bubble H2 through water, very little gets dissolved.

2. H2O2 is not made by bubbling O2 through water. It is made by a complex process
    which is to be found on Wikipedia.
Title: Re: Is there a Chemistry nutt here?
Post by: CrazyEwok on April 21, 2009, 03:07:46 AM
hmmm... was running on bad information about the O2... was told it worked much like running CO2 into water to make carbonic Acid... No matter was only a small part of the plan.
you also say "If you bubble H2 through water, very little gets dissolved" what on earth does it dissolve into... H3O2 ?!? That not possible is it?
Title: Re: Is there a Chemistry nutt here?
Post by: hoptoad on April 21, 2009, 06:51:47 AM
Quote from: CrazyEwok on April 21, 2009, 03:07:46 AM
hmmm... was running on bad information about the O2... was told it worked much like running CO2 into water to make carbonic Acid... No matter was only a small part of the plan.
you also say "If you bubble H2 through water, very little gets dissolved" what on earth does it dissolve into... H3O2 ?!? That not possible is it?


By "dissolved", it simply means that a small number of H2 molecules, (hydrogen is normally a pair bonded molecule) become trapped within the micro-space between the H2O molecules by the electrostatic tension that exists between themselves and the H2O molecules.
The majority of H2 molecules will rise to the surface of the liquid (H2O) and escape in gaseous form.

The H2 molecules do not combine chemically with H2O to form H2O2, they are merely physically suspended and trapped in the spaces between the H2O molecules.

Cheers
Title: Re: Is there a Chemistry nutt here?
Post by: Farrah Day on April 21, 2009, 12:05:43 PM
Just to confirm what Toady says.

Water readily absorbs gases from the air, which is why pure water is very hard to come by.  Gas molecules from air are effectively suspended between water molecules and as such generally do not chemically react with the water molecules themselves to form new compounds.

Fish breathe oxygen (O2) from the atmosphere that has dissolved in water. Fish do not dissociate H2O to breathe the oxygen component. 

Bubbling air through water (as in a fish tank) will maintain an oxygen rich environment - hence fish can breathe.

Hope that helps.
Title: Re: Is there a Chemistry nutt here?
Post by: triffid on April 21, 2009, 02:45:58 PM
I have a BS in chemistry and know that a very,very,very small amount of hydrogen will dissolve in water depending on temperature and pressure .The second is made (H2O2)can be made by running an electric current(how much-I don't know) through a sulfuric acid/water solution.The current drives a hydrogen atom off so you see H2 coming off in the form of bubbles leaving HSO4(-) behind which reacts with the remaining water to form H2O2.There is more than one way to make H2O2.Triffid
Title: Re: Is there a Chemistry nutt here?
Post by: triffid on April 21, 2009, 02:49:17 PM
I do not see how enough hydrogen could be dissolved in water to make any kind of difference.It just doesn't stay around long enough to be very useful.Triffid
Title: Re: Is there a Chemistry nutt here?
Post by: triffid on April 21, 2009, 02:55:58 PM
You need to know that a 90% pure solution of H2O2 is considered rocket fuel.What you buy in the stores in a brown bottle is only 3%.Triffid