Aspirin is produced by the reaction of salicylic acid (C7H6O3 . M = 138.1 g/mol) and...
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Chemistry
Aspirin is produced by the reaction of salicylic acid (C7H6O3 .M = 138.1 g/mol) and acetic anhydride(C4H6O3, M =102.1 g/mol).
                 C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + C2H4O2(l)
If 2.04 g of C9H8O4 (M = 180.2 g/mol) is produced fromthe reaction of 3.00 g C7H6O3 and 5.40 g C4H6O3, what is thepercent yield?
Aspirin is produced by the reaction of salicylic acid (C7H6O3 .M = 138.1 g/mol) and acetic anhydride(C4H6O3, M =102.1 g/mol).
                 C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + C2H4O2(l)
If 2.04 g of C9H8O4 (M = 180.2 g/mol) is produced fromthe reaction of 3.00 g C7H6O3 and 5.40 g C4H6O3, what is thepercent yield?
Answer & Explanation Solved by verified expert
Number of moles of C7H6O3 =mass/ molar mass
                                                    Â
= 3 / 138.1
                                                      Â
= 0.0217 mol
Number of moles of C4H6O3=mass/ molar mass
                                                    Â
= 5.4 / 102.1
                                                      Â
= 0.0529 mol
According to reaction, 1 mol of each should react.
So C7H6O3Â Â acts as limiting agent.
Number of moles of C9H8O4 should be produced theoretically = 0.0217
mol
mass of C9H8O4 produced theoretically = Molar mass * number of
moles
                                                                      Â
= 180.2 * 0.0217
                                                                       Â
= 3.91 gm
But actually produced = 2.04 gm
percentage yield = actual yield * 100 / theoretical
yield
                            Â
= 2.04*100 / 3.91
                            Â
= 52.2 %
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