organuic crystillization

[akcapr]

how does organic crystillization work if u have a mixture of 2 organic powders with different solubilities in the solvent? wat happens and how does it work (the recrystillization)

[YT2095]

providing the solvent and 2 different powders don`t react in anyway and maintain their "identity" then the same will occur with these organics as will occur with Inorganic re-crystalisation.

as the solvent evaporates the least soluble will come out of soln 1`st, and then the other "powder" sometime later as the evaporation continues.

 

in this instance, you can totaly ignore that they`re organic

[akcapr]

y is it that one comes out first?

[akcapr]

and how doo u make sure the other one doesnt come out also?

[xeluc]

One comes out first because it has a lower solubility. Unless they have close solubility levels.. The further apart they are, the easier they are to seperate.

 

As far as I know, the only way to make sure that the other compound does not crystalize is to measure all your stuff. If you have 100 mL of water with 2 different compounds mixed in, calculate how much of each compound will disolve in 100 mL of water at a given temp. Then, evaporate water but make sure you remove crystals before the water level drops enough for the second compound to decide to crystalize out. Or you could just guess at it..

[akcapr]

i thought more solubale one comes out first? also, does the 2nd one come out all also if u ______ (make it too cold or hot or sometin?)