C7H6O3+C4H6O3⟶C9H8O4+C2H4O2student started with 3.70 mL acetic anhydride (density=1.08 g/mL) and 1.65 g salicylic acid.synthesized 1.81 g of aspirin. find theoretical and percent yield of aspirin

Answer 1

C7H6O3 + C4H6O3 ⟶ C9H8O4 + C2H4O2 ... BALANCED EQUATION

sal.acid.....acetic anhy......aspirin.......acetic acid

First, we must must if either reactant is limiting.

mol SA present = 1.65 g SA x 1 mol SA/138 g = 0.01196 mol SA

mol AA present = 3.70 ml x 1.08 g/ml x 1 mol/102 g = 0.0392 mol AA

SA (salicylic acid) is limiting.

Theoretical yield of aspirin = -.01196 mol SA x 1 mol aspirin/mol SA x 180 g aspirin/mol = 2.15 g

Percent yield = actual/theoretical (x100) = 1.81 g/2.15 g (x100) = 84.2% yield