18) Aspirin is a monoprotic acid called acetylsalicylic acid. Its formula is HC9H7O4. A certain pain reliever was analyzed for aspirin by dissolving 0.534 g of it in water and titrating it with 0.0446 M KOH solution. The titration required 26.73 mL of base. What is the percentage by weight of aspirin in the drug?

Question

18) Aspirin is a monoprotic acid called acetylsalicylic acid. Its formula is HC9H7O4. A certain pain reliever was analyzed for aspirin by dissolving  0.534  g of it in water and titrating it with  0.0446  M KOH solution. The titration required  26.73  mL of base. What is the percentage by weight of aspirin in the drug?

DrBob222 · Answer

mols KOH = M x L = ? Since aspirin is a monoprotic acid then mols aspirin = mols KOH. g aspirin = mols aspirin x molar mass aspirin. % aspirin = (mass aspirin/0.534)*100 =