an anhydride is reacted with the phenol functional group on salicylic acid in the presence of H2SO4 and heat to produce aspirin, a pain reliever that is not as harsh on the stomach lining as straight salicylic acid. This process is called the a. isomerization of salicylic acid b. dehydration of salicylic acid c. purification of aspirin d. esterification of salicylic acid

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