D2DT
Harmless
Posts: 4
Registered: 22-6-2016
Member Is Offline
Mood: No Mood
|
|
Ammonium nitrate and hydrochloric acid ???
Hi,
I added some ammonium nitrate to some HCl and the ammonium nitrate bubbled for some time with the solution turning a light yellow colour, with some
crystals still on the bottom of the container. Would this form nitric acid with ammonium chloride or what could this solution be?
thanks
|
|
|
Tsjerk
International Hazard
Posts: 3032
Registered: 20-4-2005
Location: Netherlands
Member Is Offline
Mood: Mood
|
|
Have a look at NOCl, it forms with chloride in HNO3
|
|
|
woelen
Super Administrator
Posts: 8014
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
The bubbles most likely are a mix of Cl2 and ONCl. The light yellow color is due to dissolved ONCl in hydrochloric acid. This yellow/orange gas
dissolves very well in concentrated hydrochloric acid and is stable in such concentrated acid. When the concentration is reduced, then ONCl hydrolyzes
(reacts with water) to HNO2 and HCl.
Making HNO3 from NH4NO3 and conc. HCl hardly is possible. You get many byproducts and isolating the HNO3 from the mix is impossible. What you get is
what best can be called "poor man's aqua regia".
|
|
|
D2DT
Harmless
Posts: 4
Registered: 22-6-2016
Member Is Offline
Mood: No Mood
|
|
Thanks for the responses this helps alot 
|
|
|
CRUSTY
Hazard to Others
Posts: 139
Registered: 5-6-2016
Location: Nearby
Member Is Offline
Mood: High-Order
|
|
Quote: Originally posted by woelen  |
Making HNO3 from NH4NO3 and conc. HCl hardly is possible. You get many byproducts and isolating the HNO3 from the mix is impossible. What you get is
what best can be called "poor man's aqua regia". |
Couldn't this be used to form a sort of in situ nitric acid since you've got a proton donor and nitrate ions? Copper metal reacts with a
solution of conc. HCl and KNO3 as it would nitric acid, so I'd expect a solution of NH4NO3 and HCl to behave
similarly.
|
|
|
woelen
Super Administrator
Posts: 8014
Registered: 20-8-2005
Location: Netherlands
Member Is Offline
Mood: interested
|
|
Yes, you form in situ nitric acid, but this is mixed with the hydrochloric acid, so you always get properties similar to aqua regia.
|
|
|
PHILOU Zrealone
International Hazard
Posts: 2893
Registered: 20-5-2002
Location: Brussel
Member Is Offline
Mood: Bis-diazo-dinitro-hydroquinonic
|
|
NH4NO3 + HCl <=H2O=> NH4Cl + HNO3
So the 4 molecules are present into the mix...as discretely explained by Woelen 
PH Z (PHILOU Zrealone)
"Physic is all what never works; Chemistry is all what stinks and explodes!"-"Life that deadly disease, sexually transmitted."(W.Allen)
|
|
|
vmelkon
National Hazard
Posts: 669
Registered: 25-11-2011
Location: Canada
Member Is Offline
Mood: autoerotic asphyxiation
|
|
I recommend adding H2SO4 solution if you want to make a poor man's nitric acid solution.
Signature ==== Is this my youtube page? https://www.youtube.com/watch?v=tA5PYtul5aU
We must attach the electrodes of knowledge to the nipples of ignorance and give a few good jolts.
Yes my evolutionary friends. We are all homos here. |
|
|
unionised
International Hazard
Posts: 5126
Registered: 1-11-2003
Location: UK
Member Is Offline
Mood: No Mood
|
|
I agree- by using H2SO4 you avoid any risk of chlorides of nitrogen and also "losing" oxidising power by reaction with NH4 ions.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
