1. Presume you dissolve a compound in too much solvent in a recrystallization. Explain how would you find out that you had used too much solvent? Specified that too much solvent has been used what can you do about it?
2. Presume a Craig tube assembly has been chilled in an ice bath. Explain why must the filtration step be performed quickly?
3. Acetanilide has an mp of 114 degrees C yet it apparently melts in boiling water. Explain.
4. Explain why is it necessary to dry the purified acetanilide before taking a melting point?
5. Define why slow cooling tends to give better crystals in a recrystallization than the crystals obtained upon rapid cooling.
6. A compound is soluble in ether at room temp. However not very soluble at -80 degrees C (Dry Ice temp). Would either be a useful crystallization solvent for the compound? Explain.