Sciencemadness Discussion Board

Nitric Acid Questions

gdflp - 9-4-2014 at 06:20

I know there are many threads on the production of nitric acid, http://www.sciencemadness.org/talk/viewthread.php?tid=13090 and many disagree with each other so here is my question, what is the product when distilling a potassium nitrate for example and sulfuric acid. Lot's of threads give the equation of KNO3 + H2SO4 --> HNO3 + KHSO4, but wouldn't this reaction work with half the amount of sulfuric acid by the following equation KHSO4 + KNO3 --> HNO3 + K2SO4. Also, I have read that adding aluminum metal rids the solution of dissolved nitrogen oxides, what does this reaction proceed by. Doesn't this contaminate the solution with aluminum salts?

hissingnoise - 9-4-2014 at 06:35

Quote:
. . . wouldn't this reaction work with half the amount of sulfuric acid by the following equation KHSO4 + KNO3 --> HNO3 + K2SO4.

It does work but conversion is slow and higher temp.s are required, leading to a much increased decomp. rate of NHO3!


gdflp - 10-4-2014 at 17:04

Does anyone know of any other way to remove the dissolved nitrogen oxides from solution. I have also read on this site that simply leaving the HNO3 in open air will let them dissipate, but won't this dilute the acid due to the volatility of HNO3?

hissingnoise - 11-4-2014 at 01:27

This thread:
http://www.sciencemadness.org/talk/viewthread.php?tid=2176


gdflp - 11-4-2014 at 04:43

Thanks. Sorry, I searched and couldn't find anything.:(