Ammonia Gas

AMMONIA

How to Generate Ammonia Gas:-

Introduction:-

several classic and very simple basic demonstrations involve the use of ammonia gas. I have frequently been asked where I get ammonia gas from and very often. these demonstrations are bypassed simply because they do not have a ready source for ammonia gas. so what I would like to do is just briefly explain a simple way that anyone can produce ammonia gas for doing demonstrations. it’s very simple you need a concentrated ammonium hydroxide solution, you need a hot plate. a basic Erlenmeyer flask fitted with a one-hole rubber stopper and a delivery long enough to reach the container where you’re going to collect the ammonia gas.

property of ammonia:-

now the procedure is to place about 100 milliliters of the concentrated ammonium hydroxide solution into the flask and turn on the hot plate do not crank it. up because you do not need high temperatures using your container. For example a flask remember that ammonia gas is lighter than air also remember that it’s very soluble in water. you cannot collect it by water displacement. so it’s collected by the downward displacement of air. you would take your delivery tube and insert it into the flask with the flask mouth down. now problem is we never know when the ammonia flask is filled so the rule here is over Does it collect more gas than you think you might need? because you want to be certain that the flask is filled. once you feel it’s filled make sure you have a solid stopper ready to stop or your flask to contain the gas. now the heating process is very simple. I said don’t raise the temperature too high at about a temperature of 35 to 40 degrees. your liquid ammonium hydroxide will begin to bubble. you will call it boiling it is not boiling what it is doing is off-gassing. the ammonia gas remember there are 14 moles per liter. the ammonia gas is escaping from the water and you do not want to boil it That’s the key factor because you do not want water vapor traveling over with your ammonia gas.

if you begin to see large amounts of water vapor condensing on your flask walls your temperature is too high. you just want to get gas off of here. you do not want to get water vapor. when you’re finished simply take your flask to remove it from the heat source and cool it down. but remember do this in a hood You do not want to do this out in the open classroom simply because of the ammonia gas vapors with a hundred milliliters of gas concentrated ammonium hydroxide. you can collect four to five liters very easily of ammonia gas. so you’re not going to refill this every time you want to fill a flask you can fill several flasks from the same sample.

So this is basic theory, always take precautions for handling ammonia, and use masks and detectors in factories.

this post was written by dattakumar Panaskar from http://WWW.SUGARWALA.COM

 

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