Topic by Batavian

  • Batavian
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Topic

Aspirin is produced by the reaction of salicyclic acid (molar mass = 138.1 g mol-1) and acetic anhydride (molar mass 102 g/mol)
2C7H6O3(s) + C4H6O3(l)2C9H8O4(s) + H2O(l)
If you mix 100 g of each of the reactants, how many grams of aspirin
(molar mass 180.16 g/mol) can be theoretically obtained?

  Reply by Norm

  • Norm
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Aspirin is produced by the reaction of salicyclic acid

First u find ur limiting reactant by calculating tho moles of each.
As they react 2-to-1 it should be quite easy.

If u have less salicyclic acid than twice the amount of acetic anhydride, the salicyclic acid is the limiting reactant.

If salicyclic acid is the limiting reactant u get just as many moles of Aspirin as u have of salicyclic acid.
If acetic anhydride is the limitng reactant u get twice as many moles of Aspirin.

Then You calculate the mass of Aspirin from the number of moles.

Equations needed:

n=m/M
m=n*M