Final answer:
Using an ice bath for crystallization typically results in slower crystal formation but leads to enhanced purity of the end compound, because the controlled environment allows for better separation between the desired substance and impurities.
Step-by-step explanation:
The advantages and disadvantages of allowing crystals to form in an ice bath pertain to the rate of crystallization and the purity of the final product. An ice bath typically induces a cooler environment for crystallization to occur, which can lead to slower formation of crystals. This slower process can lead to enhanced purity, as it allows for more controlled growth of the crystals and a better separation between the desired compound and impurities. On the other hand, if crystallization were to occur quickly, impure substances might become trapped in the crystal lattice, leading to decreased purity.