Aspirin C9 H8 O4 is synthesized by reacting salycylic acid C7H6 O3 with acetic a

Question

Aspirin C9 H8 O4 is synthesized by reacting salycylic acid C7H6 O3 with acetic anhydride C4 H6 O 3. The balanced chemicalreaction is
C7H6O3 + C4H6O3 ----C9 H8O4 +HC2H3O2 3.68g of aspirin was produced from the reaction of 5.00g ofsalicylic acid and 4.35g of acetic anhydride. Use the atomicweights  H 1.008, C 12.01, N 14.01, O 16.00. Determine the limiting reaction, theoretical yield of aspirin,and percent yield for the above reaction. Aspirin C9 H8 O4 is synthesized by reacting salycylic acid C7H6 O3 with acetic anhydride C4 H6 O 3. The balanced chemicalreaction is
C7H6O3 + C4H6O3 ----C9 H8O4 +HC2H3O2 3.68g of aspirin was produced from the reaction of 5.00g ofsalicylic acid and 4.35g of acetic anhydride. Use the atomicweights  H 1.008, C 12.01, N 14.01, O 16.00. Determine the limiting reaction, theoretical yield of aspirin,and percent yield for the above reaction.

Explanation / Answer

to find the limiting reaction, you have to do dimesionalanalysis for both masses to see whaich one produces the leastamount of mole i.e your limiting reactant. (5.00 g of C4H63O )(1 mol of C4H6O3 /102 g ofC4H6O3 )( 1 mol of C9H8O4/1 mol of C4H63O) = 0.049 mol ofC9H8O4 (4.35g of C7H6O3)(1 mol C7H6O3 /138 g C7H6O3)(1 molC9H8O4/C7H6O3) = 0.032 mol of C9H8O4 since C7H6O3 produced the least amount of moles, this is thelimiting reactant now to find the theoretical yield. Use the limiting reactantand multiply by the molar mass of C9H8O4 (0.032 mol of C9H8O4)(180 g of C9H8O4) = 5.76 g of C9H8O4 now last but not least, we need to find the percent yield. theequation for that is (actual yield/ theoretical yield) x 100% (3.68g of C9H8O4/5.76g of C9H8O4) x 100% = 63.89% hope this helped. Don't forget to give Karma please now last but not least, we need to find the percent yield. theequation for that is (actual yield/ theoretical yield) x 100% (3.68g of C9H8O4/5.76g of C9H8O4) x 100% = 63.89% hope this helped. Don't forget to give Karma please

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