Question

Make a list of the properties of the solvent that make them suitable for crystallization.

Answer 1

Hint: Before knowing about the properties, first the concept of ideal solution needs to be clear. An ideal solution is the one in which the molecules of different species are distinguishable. But unlike the molecules of an ideal gas, the molecules of ideal solutions exert force on each other.

Complete step by step answer:
Crystallization is the process by which a solid forms organized crystals, from a solution. The different properties of an ideal solution for it to form crystals can be enlisted as follows:
An ideal solution must dissolve the solute when it is hot and not when it is cold. An ideal solution always obeys Raoult's Law.
The solvent should not react with the compound, i.e., the compound should neither associate or dissociate in the solvent.
The solvent should be free from impurities.
The polarity of the solvent is important. As like dissolves like, polar solvents dissolve polar solutes and non-polar solvents dissolve nonpolar solutes.
The solvent molecules should not associate among themselves.
The solvent should not be combustible as the crystallization may require high temperature processes.
Solvent should be volatile so that it is easily removed from the solute by crystallization.

Note:
Raoult’s Law states that vapour pressure of a solution due to addition of the solute is equal to the product of the mole fraction of the solute and the partial pressure of the solvent. Any solution that obeys this rule is called an “ideal solution” while solutions that do not obey Raoult’s Law are called non-ideal solutions.