Determine the theoretical yield of aspirin for a student who started the experiment with 3.489g of salicylic asid
mols SA = grams SA/molar mass SA
The mols SA = mols ASA since the ratiio is 1:1 in the equatin.
Then grams ASA = mols ASA x molar mass ASA
SA = salycilic acid
ASA = aspirin.
To determine the theoretical yield of aspirin, we need to know the balanced chemical equation for the reaction and the molar ratio between salicylic acid and aspirin. The balanced equation for the synthesis of aspirin is:
C7H6O3 + C4H6O3 -> C9H8O4 + C2H4O2
From the equation, we can see that the molar ratio between salicylic acid (C7H6O3) and aspirin (C9H8O4) is 1:1. This means that for every 1 mole of salicylic acid, we produce 1 mole of aspirin.
To find the number of moles of salicylic acid, we divide the given mass by the molar mass of salicylic acid. The molar mass of salicylic acid is 138.12 g/mol.
Moles of salicylic acid = 3.489g / 138.12 g/mol = 0.0253 moles
Since the molar ratio between salicylic acid and aspirin is 1:1, the number of moles of aspirin produced will also be 0.0253 moles.
Finally, to calculate the theoretical yield of aspirin, we multiply the number of moles of aspirin by its molar mass, which is 180.16 g/mol.
Theoretical yield of aspirin = 0.0253 moles * 180.16 g/mol = 4.561 g
Therefore, the theoretical yield of aspirin for the student who started the experiment with 3.489 g of salicylic acid is 4.561 g.