Sciencemadness Discussion Board

Quick question about mixture of HCl and nitrate salts

Random - 5-3-2011 at 03:05

I have one question about mixing HCl and ammonium nitrate:

1) If I mix excess HCl with ammonium nitrate, I should get NH4Cl, HNO3 and HCl would be still left because it's in excess. That means NOCl and Cl2 would be generated.

2) If I mix excess NH4NO3 with HCl, there should be excess NH4NO3, NH4Cl and HNO3, so that means NOCl and Cl2 wouldn't be generated.

Now, is that true? If it is, I could use 2) mixture to oxidize sugar instead of using nitric acid. It should oxidize to oxalic acid which I could separate by neutralising the solution and then precipitating the calcium oxalate.

hissingnoise - 5-3-2011 at 06:32

Are you trying for Aqua Regia or oxalic acid salts for dry distillation, or what?


Random - 5-3-2011 at 10:11

I am trying to oxidize sugar without cjlorinating it using aqua regia.

hissingnoise - 5-3-2011 at 10:58

You've lost me on the Aqua Regia!
68% HNO<sub>3</sub> should do it, I suppose!
Then again a long, strenuous bike ride would accomplish the same thing, in a manner of speaking?



Random - 5-3-2011 at 17:25

Well, I don't have HNO3 so I want to make substitute.

To simplify my question:

If I would mix HCl with excess NH4NO3, would there be aqua regia formed or just HNO3 with excess nitrate and ammonium chloride?
Because I don't want NOCl and Cl2 in that solution.

ScienceHideout - 12-3-2011 at 14:04

It ultimately depends on stoiciometry. Try balancing the equation, and messing around with the moles.

UnintentionalChaos - 12-3-2011 at 15:39

HCl will not react completely to one side with a nitrate salt (unless it's silver, lead, or Hg(I) because those ppt). So any way you cut it, you'll make aqua regia.

mewrox99 - 13-3-2011 at 00:28

If he used NaNO3 + HCl wouldn't some of the chloride ppt out as NaCl due to the common ion effect

AndersHoveland - 17-3-2011 at 13:21

I mixed 30% concentrated HCl solution with NH4NO3 and KNO3, there was no obvious reaction, but the mixture was able to slowly dissolve a copper pipe, with the generation of nitric oxides. Interestingly, although the solution was able to eventually completely dissolve the pipe after 24 hours, it did not seem to attack the plastic container it was in. Even after several days outside, the thin walled plastic water container did not rupture. The nitric oxides that were generated, however, corroded the inside of the plastic valve fitting and tubing that was inserted over the bottle.

Whether leaving a solution of 30% HCl and NH4NO3 to stand would eventually form oily droplets of dangerously sensitive NCl3, I do not know. I was only doing this as part of a different experiment.
https://sites.google.com/site/energeticchemical/exeriments
(the section is not yet complete, so do not take any trouble to read any of it. and there is nothing much interesting to see in the pictures)

hissingnoise - 17-3-2011 at 13:35

For NCl<sub>3</sub> to form you'd need quite a large excess of HCl . . .


AndersHoveland - 28-7-2011 at 11:33

Check this link out!
http://www.labyrinthdesigners.org/alchemy-laboratory/aqua-re...