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Zyklon-A
International Hazard
Posts: 1547
Registered: 26-11-2013
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Mood: Fluorine radical
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Yes, I just realized that several days ago...
8 Al + 3 NaNO3 + 2 H2O + 5 NaOH = 8 NaAlO2 + 3 NH3 worked great! I'm not sure why that many people don't
use it. The reaction is very fast, exothermic enough to easily boil the ammonium hydroxide (NH3 + H2O ↔
NH4OH), and easy to condense. The reagents are very cheap and easy to get.
[Edited on 25-4-2014 by Zyklonb]
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Illusionist
Harmless
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Did a lab on determining the concentration of ammonia in a household cleaner last week at the school (pre-uni) and titrated it with HCl. The
equivalence point was at pH 5,2 according to the curve. The cleaner was supposed to be 1,10M and we diluted it by a factor of 10 before titration.
Around 0,1M methyl red would be perfect perfect if you can see when it turns orange, otherwise clorophenol red is not so far when it turns yellow.
I guess for a higher concentration methyl orange would be a good indicator.
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subsecret
Hazard to Others
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Location: NW SC, USA
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Mood: Human Sadness - Julian Casablancas & the Voidz
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You may be able to find 10% janitorial grade ammonia solution at Ace Hardware, provided that you live near one. It doesn't foam when boiled, so no
surfactant problems.
Fear is what you get when caution wasn't enough.
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Mildronate
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Actually you can get from any ammonia salt like ammonium chloride and KOH or NaOH, there is also ammonia solution in drug store and yes in hardware
store. NH3 solution is not a problem, problems starts when you want buy methylamine 
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Rogeryermaw
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Quote: Originally posted by Zyklonb  | Ok, I don't have a reflux, only a Liebig. I have some "drain cleaner", which contains 30-60% NaOH, 30-60% NaNO3 and about 5% aluminum (
the rest is coloring I guess.) If I mix this stuff with more aluminum shavings, and add some water, it gives off crazy amounts of ammonia gas. I once
made the mistake of using aluminum powder, the reaction was way too fast, my garage was completely fumigated with ammonia... Anyway, this
will be the key to concentrated ammonia solution, I'll just bubble the gas through cold water, or maybe distill it - which would be better?
[Edited on 22-4-2014 by Zyklonb] |
i thought mixing aluminum with alkali hydroxide produced hydrogen gas...keep fire protocols in place...
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Zyklon-A
International Hazard
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It does. However, if you add a nitrate source, the nitrate will be reduced to ammonia.
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Rogeryermaw
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would there not be some sort of equilibrium there?
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