thehexlibrary
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Ammonia gas sucks water back up apparatus?
hi guys, thanks for taking the time to help me
I've been having this problem for awhile and can't figure out what to do. I'm running a reaction that generates ammonia gas in a classic distillation
set up.
The ammonia gas runs through the glassware, into tubing, and into a beaker of water, where it can bubble through and generate an ammonia solution.
The problem is, after a couple seconds a bubbling, water starts getting sucked back up the tubing, and into the glassware.
I have no idea why this is happening, maybe the ammonia dissolving in the water creates a pressure difference that causes the water to move back up?
I kmow its supposed to be possible to bubble ammonia through a water solution, i just don't know how to fix this. Does anyone know a way to prevent
water from flowing back through the setup when trying to bubble ammonia through?
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B(a)P
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Take a look here http://www.sciencemadness.org/talk/viewthread.php?tid=3836
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thehexlibrary
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thanks so much! upside down funnel seems to be the answer to my questions! will try it out and see how things work
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draculic acid69
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Also putting a spaghetti sauce jar with two nipples in the lid between the gas source and the water absorption vessel helps prevent accidents. If I
remember correctly the jar should be raised higher than the other two helps to prevent suckback.
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thehexlibrary
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draculic thanks so much! the pic is super helpful too! 'Preciate it!
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