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Author: Subject: Sodium nitrite identification
otonel
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[*] posted on 3-1-2019 at 01:19
Sodium nitrite identification


Hy and a happy new year!
I have a problem with sodium nitrite identification, I have a bottle with sodium nitrite without tag and I search for a way to identify using household chemicals.
If you can help me with an idea to solve my problem I would be grateful.
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VSEPR_VOID
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[*] posted on 3-1-2019 at 02:17


try making isopropyl nitrite with it using HCl and the alcohol. If its NaNO2 you should get a organic layer that burns with a white flame. Make sure to do the addition of the acid to the NaNO2(aq)/alcohol slowly and with lots of ice



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[*] posted on 3-1-2019 at 02:38


nitrites form a bunch of different complezes in transition metal solutions. I forget all the details and it depends a bit on what you have on hand. But a bit of research on your part and you will find a distinctive colour that you could use as a qualitative test.

You could also react with an ammonia solution and see if N2 gas evolves.
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symboom
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[*] posted on 3-1-2019 at 06:56


Ammonium nitrate, ammonium sulfate and ammonium chloride reacts with sodium nitrite forms nitrogen gas at room temperature.
https://m.youtube.com/watch?v=jezSXhkByHI

[Edited on 3-1-2019 by symboom]




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lordcookies24
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[*] posted on 3-1-2019 at 09:23


It has a density of 2.3g/cm3 so if you are courageous enough to weight a bunch of chemicals, give it a try
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[*] posted on 3-1-2019 at 09:34


Quote: Originally posted by lordcookies24  
It has a density of 2.3g/cm3 so if you are courageous enough to weight a bunch of chemicals, give it a try

what about the volume?:P





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[*] posted on 3-1-2019 at 09:40


Quote: Originally posted by Ubya  
Quote: Originally posted by lordcookies24  
It has a density of 2.3g/cm3 so if you are courageous enough to weight a bunch of chemicals, give it a try

what about the volume?:P
Powdery stuff's volume is difficult to be measured since it contains a lot of air.



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morganbw
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[*] posted on 3-1-2019 at 10:29


This is not a definitive way to identify anything, but if I had a container with what was supposed to be sodium nitrite but was worried it might not be or thought I was sold something else instead.
A Country boy test is to place a spoonful of the sodium nitrite in a beaker and dose it with strong HCl.
If you need to leave the area because of a cloud of NOx gases, that may be taken as a positive clue.
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otonel
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[*] posted on 3-1-2019 at 13:42


Thank you, was easy following your advice, I test using HCl and leave a lot of red NOx gases, second I make some isopropyl nitrite and tomorrow i want to test a mix of sodium nitrite with ureea like in this video https://www.youtube.com/watch?v=VzyWsdWfGUY
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[*] posted on 4-1-2019 at 04:50


Place a measured amount of the suspect nitrite source together with say an excess of ammonium sulfate (from the action of ammonia water on Epsom Salt) in a small plastic bottle. Crush the bottle to deflate it and place it in a safe place.

In time, the N2 formation reaction alluded to above by Symboom will cause the bottle to resemble a balloon, or even explode (take precautions to protect skin and eyes from solution contact). If one collects the N2 gas (or lets the vessel explodes in an inverted vessel filled with water), the volume of nitrogen gas formed, as indicted by the volume of displaced water, can be used to estimate the concentration of nitrite.

Interestingly, NH4NO2 (as a mix of NH4Cl+NaNO2) has been employed as a flameless pressure explosive in mines (where they may be a CH4 presence). See comments and references at http://www.sciencemadness.org/talk/viewthread.php?tid=78873#... .

[Edited on 4-1-2019 by AJKOER]
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[*] posted on 4-1-2019 at 07:57


Quote: Originally posted by fusso  
Quote: Originally posted by Ubya  
Quote: Originally posted by lordcookies24  
It has a density of 2.3g/cm3 so if you are courageous enough to weight a bunch of chemicals, give it a try

what about the volume?:P
Powdery stuff's volume is difficult to be measured since it contains a lot of air.

that's why the sarcastic ":P" XD





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[*] posted on 5-1-2019 at 17:19


If you wanted to try determining the density by way of d=m/v
You might get away with first crushing the supposed nitrite in a pestle and mortar to get rid of any air pockets, then weigh the salt and record weight, followed by dumping in into a graduated cylinder with a known volume of mineral oil in it. Then shake the solution with the precipitate that has sunk to the bottom to make sure any air pockets float to the top.
Then check the volume again and subtract it from the volume of oil in the cylinder prior to adding the salt.
This should give you a reasonably accurate determination of volume, this would work with anything that sodium nitrite is insoluble in.




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[*] posted on 2-3-2019 at 16:36


Quote: Originally posted by otonel  
Thank you, was easy following your advice, I test using HCl and leave a lot of red NOx gases, second I make some isopropyl nitrite and tomorrow i want to test a mix of sodium nitrite with ureea like in this video https://www.youtube.com/watch?v=VzyWsdWfGUY


What he said...




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