# making nitric acid

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david hahn made a solution of conc nitric and sulfuric acids, added pitchblende and could not dissolve any urananite ore. in the end, nucleosynthesized uranium 233 from thorium 232, which he thermited from the dioxide. i never understood why he did a thermite; he had to go through the trouble of shoplifting and breaking open hundreds of lithium batteries to get enough lithium to reduce the thorium dioxide. if i were him i would just use electrolysis. so much easier/cheaper that way.

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just a little tug on the reins here... but we ARE getting a little "Off Topic"

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No we're not, we're encouraging people not to try isolate uranium from pitchblende THROUGH the use of nitric acid. Though bud just explained an alternate way of creating fissionable material, so guess we're a little bit off topic.

Offtopic PS. bud did you mean electrolysis of thorium dioxide all by itself with nothing else added? Does that even work :|

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it doesnt work! youde need the molten salt.

btw, this as off topic as it gets, if you need a source of Barium or Thorium (and other goodies) the old Vacuum tubes contain MANY of these! sometimes in pure form

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could you use a ptfe tube instead of a glass tube for condensing nitic acid because i some how managed to break my glass tubes when bending them and i read that ptfe tubing is resistant to most/nearly all acids and solvents if so this would be so much more easyer and better to use as a condenser as well as putting the boiling flask in an ice bath i could also coil the tube and put that in an ice bath as well for extra cooling which would condense the fumes better

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I see no reason teflon cant be used, just bear in mind that it looses a little of its rigidity when hot, so dont rely on it being a structural part of your aparatus.

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does anybody know where to buy some ptfe tubing i have found one supplier in england but it means i have to buy 65ft for £17 when i only want about 5ft at the very maximum

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would diy shops and B&Q places like that sell ptfe tubing or even electrical shops, like maplin

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how can you tell if you are buying teflon tubing i went to B&Q and there were loads of different ones but i didnt know if any were teflon, and i dont what to ask because they will probably ask what is it for

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I personaly have never encountered teflon tubing other than the tip on a solder sucker (thats not to say it doesnt exist somewhere!). I dont have a clue where youde get it from off the top of my head.

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i can get it on line from http://www.omega.co.uk but that is much to long for me

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• 2 weeks later...

who knows where to buy some teflon tape from in england, what shops would sell it

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wahey! its Boris

long time no see dude!

as for Teflon or PTFE tape, any shop that sells Plumbing or gas fitting parts will stock it

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LOL and thank you for the quick reply, ill have a look around those shops now

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yt do you think a 2mm O/D will be big enough for a condenser made out of teflon tubing if so i can get some which is 2mm O/D and 30" long

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a 4mm ID at minimum is best, think of the gas pressure, a 2mm OD will give what? maybe a 1mm ID? thats asking for trouble!

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its ok about 10 min after i posted that thread i found a website thats dedicated to PTFE and i asked if they sell 7mm ID 1 meter long PTFE tubing and they do the 2mm OD tubing was of ebay so im ok now. thank you

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an order containing potassium nitrate and other compounds came in a week ago. of course, i want to make a little nitric just for experience. does anybody have suggestions for materials to use for collecting the gas? i understand the process of tubes leading from one beaker to another but im not so sure as to how i could do this easily without destroying the tubing

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PTFE tubing is fine against most acids use 1* 500ml flat base boiling flask to put KNO3 and sulphuric acid in, the rubber corks are going to be coverd in teflon tubing and the reciver is going to be a 500ml conical flask, hopefull the tubing can be coilled and put it in a ice bath, the conical flask is also going to be put in an ice bath to collect the gasses put a few ml of water in the conical flask and heat the boiling flask to about 80c-90c then the fumes should condense through the tube and fall in to the conical flask any gasses that have not turned into a liquid will do so when they touch the water

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my friend say's they sell PTFE tubing at B&Q he works there but its 15mm O/D is that too big or will it be fine, they also sell PTFE tape there as well

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• 1 year later...

How do I (including the ratios) make Nitric acid out of 10G of Potassium Nitrate 10G of Sulphuric acid (16M)?

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clear and simple, distill.. the gas given off is run thro a tube and then HNO3 gas turns to liquid and drips down

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since sulphuric acid is dibasic and nitric is monobasic, and youre effectively exchanging a group 1 metal in place of hydrogen, then 2 mols of KNO3 to 1 mol H2SO4 will be perfect.

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HSO4- shouldn't be considered a strong acid by any means, espcially considering the relative weakness of HNO3 as an acid. Maybe if you have something like 1.2 equivalents of KNO3 to your 1 equivalent of H2SO4 you'll see full conversion but a 2:1 would not work.

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a 1:1 will leave 1 part HNO3 and 1 part KHSO4.

KHSO4 is still usable again (but its then operating as something akin to a mono basic acid) so 1 Mol sulphuric to 2 mols KNO3 is perfect.

2KNO3 + 1H2SO4 --> 2HNO3 + 1K2SO4

Edit: (added just for the fun of it) you could get even more "Bang for you buck" using a tribasic acid like Phosphoric acid instead H3PO4, then you can use 3 parts KNO3 to 1 part Phosphoric!

and if youre REALLY clever, use ammonium nitrate instead in the correct ratio and youll get HNO3 and monoammonium phosphate, heat the the MAP again, the ammonia is driven off and your left with your original phosphoric acid again to re-use )

Double EDIT:

I rem this Quote (and typing it):

I know that if ever were blessed with having kids' date=' theyll have the Chemistry Set from HELL! ))

Muhahahahahahaaa [/quote']

well I have a 14 month old daughter now, and she can join me in saying the first 12 elements (in order) and will often chunter away to herself the same

and yes, she has all the chems shell ever possibly want AND books, I`ve been stocking up on each )

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