Question

Uuuuuup ALDU 9.128 5. Discuss how the following instances would affect the results of this synthesis? (1.5 points) a. The product was washed with hot water during filtration instead of cold water. b. The aspirin was left out to dry for weeks, resulting in a vinegar-like smell. Write the possible reaction. c. A student performing this experiment misread the amount of reactants and added 0.50 ml of acetic anhydride instead of 5.0 ml. Did this procedural error affect the theoretical yield? Explain

Answer 1

Water us used to seperate aspiun and acetic acid mixture As acetic acid is seeadily soluble in water, and Get therefore cit easily seperate quam aspirin Actually, Aspiuis is partially soluble in water. Therefore chances of solubility in cold water is very low. Therefore it espirin cis Washed with hot water then solas you may get Jess yeild of aspirin. o OH HO-H OH a I OH + CH3COOH salicylic acid acetic acid. Aspirin - If Aspirin is left open for weeks cit. absorbs to water and undergo hydrolysis to give & salicylic acid and acetic aco). the vinegar-like smell which comes is nothing but smell of acetic acid.

c. Aspirin is formed by weaction of Salicylic acid with excess of acetic wrhyolide. Therefore total yold will be very Low. for the callevation of theoritical yeild, amount of salicylic acid is considered and not acetic lenhydride, therefore theoritical veild calculation will not suffer