1.You will be given an unknown sample. Weigh it and use all of it.

2.For "Separation of Aspirin" on the middle of page 32, we will be using 5% sodium bicarbonate solution (NaHCO3), instead of 1M sodium hydroxide. Sodium hydroxide sometimes reacts with the ester group of aspirin.

3.For "Isolation of the Unknown Component" on the bottom of page 32, we will do the following:

a.Weigh your clean and dry 100 mL round-bottomed flask.
b.Transfer your dichloromethane layer form the separation of Aspirin to the round-bottomed flask.
c.Put a label on your cork ring with your name on it.
d.Take your round-bottomed flask and the cork ring to the rotary evaporators in the back of the room, and have your dichloromethane removed. If the rotary evaporators are in use, leave them there.
e.When your dichloromethane has been removed, reweigh the flask to determine the mass of the unknown.

4.After you have isolated the unknown in step 3 above, scrape it out into a 125 mL Erlenmeyer......

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Title: Panacetein
Approximate Word Count: 495
Approximate Pages: 2 (250 words per double-spaced page)

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