1. What is the purpose of recrystallization?

2. How are soluble impurities removed during recrystallization?

3. Why is an Erlenmeyer flask, rather than a beaker used for recrystallization?

4. Crystallization may be induced by scratching the inside of the flask with a glass rod. How does this induce crystallization?

5. What makes water a good solvent for the recrystallization of acetanilide?

6. Why must a limited amount of ice-cold water be used to rinse the recrystallized substance?

7. Why must the water use to rinse the recrystallized substance be ice-cold?

8. Why is vacuum filtration preferred over gravity filtration?

9. Why can a water-ethanol mixture but not a water-hexane mixture be used for recrystallization?