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Author: Subject: preparation of hydrogen gas under pressure
reidy2015
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[*] posted on 18-4-2015 at 16:51
preparation of hydrogen gas under pressure


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Loptr
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[*] posted on 18-4-2015 at 16:53


Yes? No? Maybe?

I honestly have no clue.

[Edited on 19-4-2015 by Loptr]
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HgDinis25
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[*] posted on 18-4-2015 at 16:55


Get into school. Do not study anything (very important part). Wait until the night before your exams. Add Sodium Hydroxide solution to aluminium. There you go, making hydrogen under pressure...
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reidy2015
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[*] posted on 18-4-2015 at 17:25


Thanks :)
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Magpie
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[*] posted on 19-4-2015 at 13:18


Covering zinc with H2SO4 is another way to generate hydrogen. Also there is electrolysis of water. Is there a preferred method for lab scale hydrogenations at atmospheric pressure? Or is the choice simply a matter of convenience/economics?



The single most important condition for a successful synthesis is good mixing - Nicodem
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[*] posted on 19-4-2015 at 15:47


NaBH4 is probably the best. Unfortunately, the price has never come down enough to allow for wide popularity.

Just drip an NaBH4/H20 solution into acid, via a hypodermic needle inserted into a mercury-valve supplying a sealed system. Hydrogen is generated, creates back pressure, and momentarily stops liquid flow until the H2 is consumed. Valve will feed automatically, until reaction eventually stops absorbing hydrogen.
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