Question

A student reacts 62g of salicylic acid with 58 mL of acetic anhydride producing 29.6g of acetyl salicylic acid. What is the percent yield of the reaction?

Answer 1

salicylic acid        + acetic anhydride -----> acetyl salicylic acid

M.wt=138.12 g·mol⁻¹ M.wt=102.09 g/mol   ------> M.wt=180.157 g/mol

wt= 62g                     wt= 58 mL                        wt.=29.6g (experimental yield)

Theoritical yield= (180.157 x 62)/ 138.12= 80.8697 g

so, percentage yield= (experimental yield x100)/ theoritical yield= (29.6 x100)/ 80.8697=36.60 % is the percent yield of the reaction.