QUESTIONS 1. What is the purpose of the concentrated phosphoric acid used in the first step? 2. What would happen if the

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Questions 1 What Is The Purpose Of The Concentrated Phosphoric Acid Used In The First Step 2 What Would Happen If The 1 (33.59 KiB) Viewed 29 times

QUESTIONS 1. What is the purpose of the concentrated phosphoric acid used in the first step? 2. What would happen if the phosphoric acid were left out? 3. If you used 250 mg of salicylic acid and excess acetic anhydride in the preceding synthesis of aspirin, what would be the theoretical yield of acetylsalicylic acid in moles? In milligrams? 4. What is the equation for the decomposition reaction that can occur with aspirin in water? 5. Most aspirin tablets contain five grains of acetylsalicylic acid. How many milligrams is this? (Hint: See the essay "Aspirin.") 6. A student performed the reaction in this experiment using a water bath at 90°C instead of 50°C. The final product was tested for the presence of phenols with ferric chloride. This test was negative (no color observed); however, the melting point of the dry product was 122-125°C. Explain these results as completely as possible. 7. If the aspirin crystals were not completely dried before the melting point was determined, what effect would this have on the observed melting point?