Aspirin Synthesis Process Questions

This video tutorial demonstrates the synthesis of aspirin. It begins with setting up an ice bath and a hot water bath, followed by weighing salicylic acid and mixing it with acetic anhydride and phosphoric acid. The mixture is heated, cooled, and crystallized. The crude product is filtered and dried, then purified using ethanol. The final product is weighed and analyzed.

What is the first step in the synthesis of aspirin as demonstrated in the video?

• Setting up an ice bath

• Adding acetic anhydride

• Weighing salicylic acid

• Setting up a hot water bath

How much salicylic acid is weighed out for the synthesis?

• 0.25 grams

• 1.0 grams

• 0.75 grams

• 0.5 grams

Which acid is added to the flask after acetic anhydride?

• Sulfuric acid

• Nitric acid

• Phosphoric acid

• Hydrochloric acid

What is the purpose of using a hood during the addition of chilled water?

• To prevent contamination

• To avoid inhaling acetic acid vapors

• To speed up the reaction

• To maintain temperature

What apparatus is used for filtering the crude aspirin?

• Separatory funnel

• Buchner funnel

• Distillation column

• Conical flask

How long should the vacuum run to ensure the crude product is dry?

• 10 minutes

• 5 minutes

• 3 minutes

• 7 minutes

What solvent is used to dissolve the crude aspirin for purification?

• Methanol

• Water

• Acetone

• Ethanol

What is added to the dissolved aspirin to initiate recrystallization?

• Room temperature water

• Hot water

• Chilled water

• Ice cubes

How long does crystal formation continue during the purification process?

• 1 to 5 minutes

• 5 to 15 minutes

• 15 to 20 minutes

• 20 to 30 minutes

What is the final step after drying the purified aspirin?

• Adding more ethanol

• Weighing and recording the mass

• Storing in a refrigerator

• Heating the product