In an Honors organic chemistry lab, a student devised an experiment in which she would treat benzoic acid with t-butanol in an a
cid-catalyzed esterification reaction using concentrated sulfuric acid. Regretfully, the synthetic yield of the expected ester was exceedingly low. Please explain this outcome in terms of the chemistry that actually occurred in the reaction flask. [This attempted esterification reaction would have been better suited to dicyclohexylcarbodiimide (DCC/pyridine) esterification conditions.]
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Answer:
44.28 grams.
Explanation:
Let us write the balanced reaction:
As per balanced equation, six moles of fluorine gas will give four moles of PF₃.
The mass of PF₃ required = 120 g
The molar mass of PF₃ = 88g/mol
Moles of PF₃ required =
The moles of fluorine gas required =
the mass of fluorine gas required = moles X molar mass = 0.91x38 = 34.58g
Now this much mass will be required if the reaction is of 100% yield
But as given that the yield of reaction is only 78.1%
The mass of fluorine required =