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ar File Edit View History Bookmarks Window Help webassign.net McGraN-Hill Conrect l Homework 2 I 17. t-f0.1 points 014 Submissions Used Aspirin, CoHg04, is produced from salicylic acid, C M603, and acetic anhydnide, C4HeOa, as shown below. (a) How much salicylic acid is required to produce 2.3 x 102 kg of aspirin, assuming that all of the salicylic acid is converted to aspirin? b How much salicylic acid would be required if only 69% of the salicylic acid is converted to aspirin (o) what is the theoretical vield of aspirin If 159 kg of saicylic acid s alowed to react with 171 kg of acette anhydride? (6) If the situation described in part ( produces 171 ks of aspirin, what is the percentage yiek? 18, +-/0.1 point 044 Subm issions Used Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nitrate. A solution containing 4.25 g of s mixed with one containing 3.50 g of silver nitrate. After the reaction is complete, the solutions are evaporatod to dryness, leaving a mixture of salts. i each of the following compounds are present after the reaction is complete? sodium carbonate silver nitrate 6 FS 4 5 7 2 3Explanation / Answer
a)
Stoichiometrically, 1mole salicylic acid is reacting with 1mole of Acetic anhydride to produce 1mole of aspirin
No of mole of Aspirin to be produced =230000g/180.158g/mol =1276.66mol
No of mole of Salicylic acid required= 1276.66moles
Mass of Salicylic acid = 1276.66mole × 138.121g/mol = 176.33kg
b)
Mass of Salicylic acid for 69% conversion = (176333g/100)×69% = 121.67kg
c)
No of mole of salicylic acid = 159000g/138.121g/mol=1151.2
No of mole of Acetic anhydride = 171000g/102.09g/mol =1675moles
salicylic acid is limiting reagent
1151.2moles of salicylic acid give 1151.2moles of Aspirin
Mass of Aspirin produced = 1151.2moles ×180.158g/mol =207.4g
Theoretical yield = 207.4g
d)
Percent yield = (Actual yield /Theoretical yield) ×100
= (171g/207.4g) ×100
= 82.45%
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