2007-11-05 14:48:37 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
You want to re-crystalze from a hot, concentrated solution, but if you try to crystalize from a solvent that is above the melting point of the material you are trying to cyrstalize, you will just get an oil (which may ultimately solidify, but very little purification will occur). If you use a solvent which boils below the melting point of the material being isolated, you can prepare the most concentrated solution possible (at boiling point of solvent) to maximize the yield of recovered material when cooled, but avoid forming the product as an oil.
2007-11-05 14:58:59 · answer #1 · answered by Flying Dragon 7 · 0⤊ 0⤋
If it is higher then there is a tendency for the material to oil out and not form a solid. However, there are other things to consider in crystallization.
2007-11-05 14:58:16 · answer #2 · answered by Bullwinkle Moose 6 · 0⤊ 0⤋
Wow, I almost fell asleep just reading your question, that's how boring it was
2007-11-05 14:51:44 · answer #3 · answered by Devo 4 · 0⤊ 0⤋