Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Aspirin, $\text{C}_9\text{H}_8\text{O}_4$, $M_r = 180.0$, may be prepared by reacting 2-hydroxybenzoic acid, $\text{C}_7\text{H}_6\text{O}_3$, $M_r = 138.0$, with ethanoic anhydride, $\text{C}_4\text{H}_6\text{O}_3$, $M_r = 102.0$. The balanced equation for this reaction is shown. $\text{C}_7\text{H}_6\text{O}_3 + \text{C}_4\text{H}_6\text{O}_3 \rightarrow \text{C}_9\text{H}_8\text{O}_4 + \text{C}_2\text{H}_4\text{O}_2$ If the reaction mixture contains $10.0\,\text{g}$ of each reactant, what is the greatest mass of aspirin that can be formed?

  • A$5.7\,\text{g}$
  • B$10.0\,\text{g}$
  • C$13.0\,\text{g}$
  • D$17.6\,\text{g}$

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