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Concentrating H2SO4 without distillation with flask ans some PTFE

Latin King

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Shameless copy paste from
Code:
sciencemadness.org
That is you can make up to 99%(I know H2O and H2SO4 Azeotrope is 98%) Concentrate H2SO4 by this simple setup.I know it seems like magic but it not.it use Graham's law of effusion (also called Graham's law of diffusion) https://en.wikipedia.org/wiki/Graham's_law coupled with Raoult's law and Dalton's law. since water is about 5 times lighter than Sulfuric Acid it will diffuse faster.
if you think i'm lying hold a pH paper above to check the Difference.

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about 2 years ago I discovered something very useful Accidentally on Purpose .
it uses 30-35% acid from battery suppler mix in with glass chips to prevent flash boiling .The opening of the flask is covered by 2-4 layers of plumbers PTFE tape if you use thick ones 1-2 will suffice.just try one layer first you can add more if necessary. secure them in place using CAPTON tape.

Use a sand heating to evenly and slowly heat the flask.otherwise PTFE layer will pop. i recommend flask with a big surface area opening(this is what i had in hand)
let the water escape leaving behind acid . i don't recommend pushing this to the extreme. note in hand don't boil the content in the flask just let it evaporate for safety resonances.
pros - all acid will concentrate in signal run
easy to clean just one flask
cons - this doesn't purify the acid
take bit more of time
need attention

Source
Code:
https://www.sciencemadness.org/whisper/viewthread.php?tid=152456#pid618770

While i was searching for a method to concentrate acid that i read a long time ago i bumped into this. Anyone here familiar with this approach?
 
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