02-11-02 03:43
No 267900
I posted this question in the Newbee forum but no-one seemed to be able to help me out so I was interested if any of the more experienced Bees could help me out.
I was curious whether or not mixing solvents decreases the solubility of certain salts in them. Eg. if a certain amount of water can disolve 25 grams of salt, if one was to add the same amout of water to a solvent that salts don't disolve in (say acetone, methanol etc) then would the same amount of salt be able to be disolved in the second solution? Does it make any difference whether or not the 2 solvents form an azeotrope?
I wouldn't do that if I were you.....
(Old P2P Cook)
02-11-02 06:05
No 267961
I was curious whether or not mixing solvents decreases the solubility of certain salts in them.
Yes, you can take some material Z dissolved in solvent A and then add solvent B to decrease the solubility of Z and make it crash out of solution.
Example: You have a solution of MDMA.HCl in solution in methanol/water. You can add acetone or ether to get some of the MDMA.HCl to fall out of solution.
Another example: After doing an Al/Hg amalgam reduction you have MDMA freebase dissolved in methanol. You add a lot of water to make the freebase fall out of solution.