Answer to Question #260010 in General Chemistry for jasfghvbb

Question

Aspirin is one of the products when you mix Salicylic acid and Acetic anhydride. One

kilogram of Salicylic acid produced one thousand and two hundred grams of Aspirin.

C7H6O3(s) + C4H6O3(l) C9H8O4(s) + CH3COOH(i)

a. Balance the chemical equation;

b. Identify the limiting reactant and the excess reactant if applicable;

c. Compute for the theoretical yield;

d. Determine the percent yield of the reaction;

e. Calculate the percent error and

f. Compute for the excess amount of the excess reactant if applicable.

Answer 1

C₇H₆O_3(S) + C₄H₆O₃ → C₉H₈O_4(S) + CH₃CO₂H

According to the reaction, n (C₉H₈O₄) = n (C₇H₆O₃)

n = m / M

M (C₇H₆O₃) = 138.121 g/mol

M (C₄H₆O₃) = 102.09 g/mol

M (C₉H₈O₄) = 180.16 g/mol

n (C₇H₆O₃) = 1 000 / 138.121 = 7.24 mol

n (C₉H₈O₄)_theoretical = n (C₇H₆O₃) = 7.24 mol

m (C₉H₈O₄)_theoretical = n x M = 7.24 x 180.16 = 1304 g

%(C₉H₈O₄) = 1200 / 1304 x 100 = 92%