theoretical and percent yield

Question

if .50 moles of salicylic acid .30 moles of acetic anhydride yield .25 moles of Asprin, calculate the theoretical and percent yield

Answer 1

As pointed out in another post, the rx is SA + acetic anhydride = aspirin + acetic acid

The mole ratio is 1 mole SA : 1 mole anhydride : 1 mole aspirin

In this example, acetic anhydride is the limiting reactant, so theoretical yield is 0.30 moles aspirin.

Percent yield is 0.25 moles/0.30 moles (x1005) = 83.3%