Question #b447f

1 Answer
Dec 7, 2016

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Synthesis of aspirin (acetylsalicylic acid) follows the reaction as represented by the above balanced equation.

As per above equation acetic anhydride and salicylic acid reacts in #1:1# mole ratio.

The amount of acetic anhydride in #6.8mL#

#=6.8mLxx1.08g/"mL"=7.344g#

Now by the equation

#102.09g# acetic anhydride reacts with #138.12g# salicylic acid.

So #7.344g# acetic anhydride requires #138.12/102.09xx7.344=9.936g# salicylic acid.

But the amount of salicylic acid actually taken is #3.395#.

So this is the limiting reagent.

We are to calculate the theoretical yield with respect to this reagent.

Now by the above equation we know that #138.12g# salicylic acid produces #180.157g# aspirin.

So #3.395g# salicylic acid will produce #180.157/138.12xx3.395=4.428g# aspirin.

So theoretical yield of aspirin #=4.428g#