Sciencemadness Discussion Board

Solubility at low temperatures

Squall - 24-9-2008 at 17:51

I have been looking for the solubility of KNO3 at temperatures below zero, but i have had no luck finding such information. Can anyone point me to a source either a book or a site. I would greatly appreciate the help. thanks

Squall - 24-9-2008 at 19:23

my problem is i have a solution of KNO3 and NaCl since the dissolved NaCl lowers freezing temp. i would like to know how much more KNO3 can be precipitated by cooling down to say -10 degrees Celsius.

kclo4 - 24-9-2008 at 19:53

How about precipitating out the Sodium chloride when the solution is boiling away, when it is really hot?

http://homepage.mac.com/dtrapp/PSgraphics.f/solubilities.gif

Seems like NaCl would be the first to come out of solution as the water left. but maybe Potassium Chloride.. though i highly doubt this. Unless of course some funky thing happens forming Sodium Nitrate and Potassium Chloride.