Need help calculating theoretical yield of aspirin & percent yield. section Data

Question

Need help calculating theoretical yield of aspirin & percent yield. section Data Sheet I Synthesizing Aspirin mass of salicylic acld,g mass of acetic anhydride, g (densitv 1,08 g ml.- number of moles of sallcylicui138 g mor) rof moles of acetic annren. WerO2 g mort) 0.0yaal- Satieylie acid 0.041 30.1 20.7q0 9 31.585 limiting reagent mass of filter paper, g mass of watch glass, g mass of filter paper and watch glass, g mass of aspirin crystals, filter paper, and watch glass,g actual yield of aspirin, g theoretical yield of aspirin (GMM: 180 g mo), g percent yield, % Testing Your Synthesized Aspirin salicylic acid + ethanolic FeCl3 solution aspirin + ethanolic FeCl3 solution ethanolic FeCl solution Il. observations conclusion based upon above observations observations of heated synthesized aspirin IIl. Treating the Discarded Reaction Mixtures and Rinses Solution for Disposal initial color of Discarded Reaction Mixtures and Rinses solution after adding phenolphthalein solution name and molarity of solution used to neutralize Discarded Reaction Mixtures and Rinses" solution

Explanation / Answer

Ans. The balanced reaction for synthesis of acetylsalicylic acid (aspirin) is as follow-

C7H6O3 + C4H6O3 ------> C9H8O4 + CH3COOH             - reaction 1

C7H6O3 = salicylic acid

C4H6O3= acetic anhydride

C9H8O4 = aspirin

CH3COOH = Acetic acid

Theoretical molar ratio of reactants = Salicylic acid : Acetic anhydride = 1 : 1

# The stoichiometry of product follows the stoichiometry of limiting reactant.

# According to stoichiometry of balanced reaction, 1 mol salicylic acid produces 1 mol aspirin. So, theoretically, 1 mol salicylic acid shall produce 1 mol aspirin.

So,

            Theoretical moles of aspirin produced = 0.015 mol = Moles of salicylic acid

            Theoretical mass of aspirin produced = Moles x Molar mass

                                                                        = 0.015 mol x (180.16012 g/ mol)

                                                                        = 2.702 g

Therefore, theoretical yield of reaction = 2.702 g

# From data provided-

Actual yield of aspirin = 0.786 g

Now,

            % yield of synthesis = (Actual yield of aspirin / Theoretical yield of aspirin) x 100

                                                = (0.786 g / 2.702 g) x 100

                                                = 29.10 %

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