To calculate the theoretical yield of aspirin from 5 grams of salicylic acid, we need to use stoichiometry. First, we need the balanced chemical equation for the synthesis of aspirin:C7H6O3 salicylic acid + C4H6O3 acetic anhydride C9H8O4 aspirin + C2H4O2 acetic acid Now, we need the molar masses of salicylic acid and aspirin:Salicylic acid C7H6O3 : 7 12.01 + 6 1.01 + 3 16.00 = 138.12 g/molAspirin C9H8O4 : 9 12.01 + 8 1.01 + 4 16.00 = 180.16 g/molNext, we need to convert the mass of salicylic acid to moles:5 g salicylic acid 1 mol salicylic acid / 138.12 g = 0.0362 mol salicylic acidSince the stoichiometry of the reaction is 1:1, the moles of salicylic acid will be equal to the moles of aspirin produced:0.0362 mol salicylic acid = 0.0362 mol aspirinNow, we can convert the moles of aspirin back to grams:0.0362 mol aspirin 180.16 g / 1 mol aspirin = 6.52 g aspirinTherefore, the theoretical yield of aspirin that can be obtained from 5 grams of salicylic acid using excess acetic anhydride in the synthesis process is 6.52 grams.