hafizah asked: actually, i have difficulty to understand how actually the right procedure to recrystallize my compund from ethanol. Do i need to dissolve all my sample in hot ethanol and wait until the solvent dry? but i didnt get the pure product with that. and how much solvent should we put it while recrystallize?
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Who cares nerd. Thanks for the points!
1. Place 4 ml of the stock solution in a medium test tube.
2. Add approximately 1 ml of the distilled, unknown compound to the test tube.
3. Warm the mixture for 5 – 10 minutes in a warm water bath.
4. Slowly cool the mixture to room temperature (10 – 15 minutes) to begin crystallization. Then place in an ice bath until crystallization is complete.
5. Isolate the solid product using suction filtration utilizing a Buchner funnel. It is important the filter paper fits the funnel exactly, otherwise product will be lost.
6. Wash the solid product, while in the Buchner funnel, with 2 – 3 ml of ice cold water.
7. Collect and dry the product.
8. Transfer the product to a small test tube and recrystallize it from boiling ethanol.
9. Cool slowly to room temperature, then place in an ice bath.
10. Isolate the solid via suction filtration. Wash the product with 1 ml of ice cold ethanol. Wash by dropwise addition of the cold ethanol.
11. Collect the product, and dry
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