What was the melting point of the first synthesis of aspirin?
Synthesis of Aspirin. 1.081g of Salicylic acid was obtained after the first synthesis. It was thin, short white crystals and had a melting point range or 154-155 degrees Celsius. 1.600g of aspirin was obtained after the second synthesis. This was a white powder and had a melting point range of 134-135 degrees Celsius.
How to synthesize aspirin with deionized water?
1. Label three test tubes; place a few crystals of salicylic acid into test tube #1, a small sample of your aspirin into test tube #2, and a small sample of crushed commercial aspirin into #3. Add 5 mL of deionized water to each test tube and swirl to dissolve the crystals.
How to synthesize aspirin with ferric chloride?
1 Label three test tubes; place a few crystals of salicylic acid into test tube #1, a small sample of your aspirin… 2 Add 10 drops of 1% ferric chloride to each test tube. 3 Compare and record your observations.
What are the steps in the recrystallization of aspirin?
Synopsis. The main procedures are preparation of aspirin, recrystallisation of aspirin and lastly determining the melting point of the aspirin. For preparation of Aspirin, acetic anhydride is added to the measured amount of salicylic acid. Sulphuric acid is added and heated for a short period to complete reaction.
How do you make crystals of aspirin from acetic anhydride?
At this point, the flask no longer needs to be under the hood, since the acetic anhydride is now gone. Add 9-10 mL of deionized water to the flask and swirl it around to mix it. As the flask cools, crystals of aspirin will start to form. When you see crystals, put the flask in an ice bath for 10 minutes.
How do you make aspirin in a capillary tube?
Obtain a capillary tube from your instructor, and gently press the open end into the pile of aspirin crystals on the paper so that a few crystals of aspirin enter the capillary tube. 2. Tap the closed end of the capillary onto the bench top, so that the aspirin crystals work their way to the bottom.
