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bismuthate
National Hazard
Posts: 803
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Location: the island of stability
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Could you make conc. nitric acid by adding 98% H2SO4 to barium nitrate and filtering?
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Bot0nist
International Hazard
Posts: 1559
Registered: 15-2-2011
Location: Right behind you.
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Mood: Streching my cotyledons.
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UTFSE! This has been asked and asked. Calcium, barium, etc. etc.
It would still be contaminated. A simple ground glass distillation apparatus is what you need my friend...
U.T.F.S.E. and learn the joys of autodidacticism!
Don't judge each day only by the harvest you reap, but also by the seeds you sow.
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bismuthate
National Hazard
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I don't really need purity i just wanted something quik to use for making nitrocelluslose and other stuff that is just for my enjoyment. yes i do know
that this has been brought up i coulb guess as much i just wanted to give him an easy quick option even if it is contaminated. sorry for repeating
things that have been brought up.
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malford
Hazard to Others
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Registered: 17-6-2013
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Perhaps someone in this area of the forum could help me. I am distilling concentrated nitric acid by using sulfuric acid to modify the azeotrope. I
have a nice distillation setup with vacuum. Before I begin experimenting, I like to theoretically understand exactly what is supposed to happen and
then see if results match my expectations.
I am starting with 70% nitric acid and 98% sulfuric acid. I assume the 30% impurity in the nitric acid is largely water. As such, if I were to distill
it alone, I would be left with 68% nitric acid which is the azeotrope. I would like to get as close to 100% using distillation as possible, then
attempt other methods for the final minute concentration.
By adding the sulfuric acid to the nitric acid, the sulfuric acid reacts with the water in the nitric acid to form HSO4- and H3O+ according to
Wikipedia. What exactly does this mean? Is all of the 30% water changed to H3O+? Is all of the sulfuric acid changed to HSO4-? If so, are these newly
formed molecules azeotropic with the HNO3 that we are trying to concentrate?
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metalresearcher
National Hazard
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Registered: 7-9-2010
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Hi,
Maybe this helps, KNO3 +H2SO4 concentrated. I tried it a half year ago.
<iframe sandbox width="640" height="360" src="//www.youtube.com/embed/Q_phkOS6WTk" frameborder="0" allowfullscreen></iframe>
[Edited on 2013-10-3 by metalresearcher]
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