also During a Chem 121 experiment a student synthesized acet

also

During a Chem 121 experiment, a student synthesized acetylsalicyclic acid (aspirin) by adding 5.0 ml of acetic anhydride and 5 drops of conc. H2SO4 (catalyst) to an erlenmeyer flask containing 2.05 g of salicylic acid. Given that the reaction proceeds as shown below, answer the following questions: COOH COOH c. H2S04 H3CH COOH salicylic aod acetic anhydride acetylsalicylic acd Given the following information: molar mass of salicylic acid is 138.12 g/mol molar mass of acetic anhydride is 102.09 g/mol molar mass of acetylsalicylic acid is 180.16 g/mol density of acetic anhydride is 1.082 g/mL 1. Which reagent is the limiting reagent in this reaction? Clearly show your calculations

Solution

Mass of salicylic acid = 2.05 gm

Moles of salicylic acid = 2.05 / 138.12 = 0.0148 Moles

Volume of Acetic anhydride = 5 ml  

Moles of acetic anhydride = 5 x 1.082 / 102.09 = 0.05299 Moles

Acetic anhydride is present in excess amount since both reactants are need one equivalent

Moles of aspirin produced = 0.0148 Moles

Mass of aspirin produced (Thoretical yield) = 0.0148 x 180.16 = 2.67 gm

Mass of aspirin for 54.2 = 2.67 x 54.2 / 100 = 1.44 gm