Question

What are the properties of a good solvent for carrying out a crystallization? What are the factors that affect how much of a solid will dissolve in a particular solvent?

Answer 1

The properties of a good solvent are :

1 . The solute must be very soluble near the boiling point of the solvent and very less soluble at the room temperature.

2. It should not dissolve the impurities at high temperature , if does they should remain in dissolved form at room temperatures also.

3. The solvent must not react with the solute that has to be purified.

4. It should be volatile so that the solute can be dried easily.

The factors that affect the solubility of solid into solvent are : its polarity , its reactivity with the solid , its density , its boiling point etc.