Thank you for the opportunity to help you with your question!

for b: 2.05 x 102 Kg x 833.3= 174.2kg

for c: by calculation No# of mol we find that that acetic anhydrid is the limiting reactant so all calcutation depends on it
1 mol of acetic = 1 mol of aspirin ( from equation)
mole of acitic = 125000g / 102 g/mol = 1225,50 mol = mol of aspirin
mass of aspirin = 1.388x 180 = 220590g ( 250kg) and this is the theoretical yield

the pecentage yield = (actual / theoretical) x 100 %
= (182 kg / 250kg) x 100 = 72.8%

Please let me know if you need any clarification. I'm always happy to answer your questions.

moles aspirin = 1.0 x 10^2 x 1000 g / 180.157 g/mol= 555
moles salicylic acid = 555
mass salicilyc acid = 555 mol x 138.123 g/mol= 76658 g => 76.7 Kg

76.7 x 100 / 85 = 90.2 Kg

moles acid = 183000 g / 138.123 =1325
moles anhydride = 183000 g / 102.089 g/mol= 1793 ( in excess)
we get 1325 moles aspirin
mass = 1325 mol x 180.157 = 238708 g = >238.7 Kg

% = 187 x 100 / 238.7 = 78.3

Jul 24th, 2015

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