Answer:
Salicylic Acid is the limiting reagent
Theoretical yield Aspirin: 1.62 g
Percent yield: 76 %
Explanation:
The balanced chemical reaction is
C4H6O3+C7H6O3 ⇒ C9H8O4+C2H4O2
Therefore is a 1:1 reaction. This information along the molecular weights of C4H6O3 (MW: 102.9 g/mol), C7H6O3 (MW: 138.1 g/mol) and C9H8O4 (MW: 180.2 g/mol) is sufficient to answer the question once we have converted the mass to mol for the reactants.
mass C2H4O2 = d x v = 2.90 mL x 1.08 g/mL = 3.13 g
# mol C2H4O2 = 3.13 g/102.9 g/mol = 0.030
# mol C7H6O3 = 1.28 g/138.1 g/mol = 0.009
Therefore C7H6O3 is the limiting reagent since it reacts 1: 1 with C2H4O2
Calculation of theoretical yield:
0.009 mol C7H6O3 x 1 mol C9H8O4 / 1mol C7H6O3 = 0.009 mol C9H8O4
Now we convert mol of aspirin :
0.009 mol C9H8O4 x 180.2 g/mol = 1.62 g ( 100 % yield)
Percent yield:
1.23 g collected/ 1.62 g x 100 = 76 %
