Solvents help!?

Question

2 Questions

1. In choosing a suitable solvent for the purification of an organic solid by crystallisation, what essential features must be looked for?

2. Explain how the following are removed during the procedure of crystallisation of an organic solid,

a. Insoluble impurities

b. Souluble impurities

Any help would be great.

Thanks

Answer 1

It must have good solubility at high temperature and poor solubility at low temperature.

2) .by filtration

.by difference on solubility