Question

A student weighed out 0.438 g anthracene and dissolved it in 5.14 mL xylene. They then added 0.269 g maleic an hydride, fit the flask with a reflux condenser and let the reaction reflux for 30.9 min. They isolated 0.582 g of product crystals. What was their percent yield? Type your answer rounded to the first decimal place (ex NN.N) without units or a percent sign.

Answer 1

Xylene deniu 1.0 mole l'omole 1.0 mole Stoichiometat mules stoichiometric weights 178 gms 98 grams 270gmy Given wts 0438gms 0.269 gry 0.582gmy from the balanced equation 98 gms of maleic anhydride = 178 gmr of Anthracene 0.269 gons of maleic anhydride = 0.269x178 = 0.488 gms of 98 Anthracene Hence, Anthracene is Limiting reagent i. she amant of product formed = 0438* 276 = 8.679 gry 178 % of yield of the reaction = 0.582x100 -85-7 4. 0679