Reference no: EM131076618

1. Determine the percentage of aspirin (acetylsalicylic acid) present in aspirin tablets. Can you make any statements about the other materials aside from aspirin that must be in the tablets based upon what you observed in this laboratory ?

2. Predict a melting point if you combined and mixed 10 mg each of the three reference samples for solubility (naphthalene, benzoic acid and benzophenone). Provide a statement that supports your prediction.

3. If you dissolve 975 mg of aspirin (the amount in three tablets) in boiling water to form a saturated solution and cooled to room temperature followed by filtration to collect the crystallized aspirin, what mass of aspirin would you expect based on your measured values
of aspirin solubility? If you took the mass of aspirin that you calculated from the water crystallization and formed a saturated solution in boiling ethanol and allowed the solution to cool and collected the crystals at room temperature what mass of aspirin would you expect
from the ethanol crystallization? For both of these compare to the masses actually obtained in the lab for these two procedures and comment if the masses are similar or not. If not similar give a reasonable explanation as to why this might be the case.

4. Explain why aspirin is more soluble in ethanol than in water. Please answer all questions "Crystalization lab "