TheDulki - 7-10-2013 at 03:56
Hey, i'm trying out this reaction:
NaCl + KNO3 = KCI + NaNO3
But does anyone know the solubility of KCI and NaNO3 so i can separate the two?
ScienceSquirrel - 7-10-2013 at 04:47
Solubility table;
http://en.wikipedia.org/wiki/Solubility_table
jock88 - 7-10-2013 at 08:09
http://www.sciencemadness.org/talk/viewthread.php?tid=20352
Look up mutual solubility of salts involved.
MrHomeScientist - 7-10-2013 at 08:35
That may not work as you think it will. When mixing solutions of those two salts, what you actually end up with is a bunch of dissolved ions floating
around in solution: Na+, Cl-, K+, and NO3-. There isn't really a reaction, per se. A
common way to separate them back into compounds is to use solubility like you want to do. However, KNO3 is much less soluble than any of
the other compounds on either side of your equation. So it will precipitate out first upon cooling the solution, and you won't be able to get
NaNO3 this way. This reaction is usually run in reverse to what you wrote, because separation of KNO3 is simple and that product
is usually preferred because it is less hygroscopic.
Other methods of producing sodium nitrate can be found on its Wiki page. These include neutralizing nitric acid with sodium carbonate, or by mixing
ammonium nitrate with a basic sodium salt. I like the latter because ammonium nitrate is commonly found OTC in instant cold packs.