A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. Th…

Question

A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. The % yield of this reaction is:-

Accepted Answer

Correct answer: D. (d) Molar mass of aniline (C_6H_5 NH_2 )=93 g/ mol. Moles of aniline =9.3/93=0.1 mol. From the reaction, theoretical yield of acetanilide =0.1 mol. Molar mass of acetanilide (C_6H_5 NHCOCH_3 )=135 g/ mol. Theoretical mass =0.1 135=13.5 g. Percentage yield = (11/13.5 ) 100=81.5 \%

$A student has planned to prepare acetanilide from aniline using acetic anhydride. The student has started from 9.3 g of aniline. However, the student has managed to obtain 11 g of dry acetanilide. The % yield of this reaction is:-$

Solution

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