Ideally, the crystals should be soluble at high temperatures (typically the boiling point of the solvent) and insoluble at low temperature (usually ice bath temperature). Please remember that "insoluble" means that we cannot create a concentrated solution of the compound in a given solvent. In ...
solvent should have a ___ boiling point low and volatile volatile easily aroused or changeable; lively or explosive Ethyl Acetate intermediate polar -- dipole-dipole Acetic Acid Very polar methanol very polar stationary phase solid phase (very polar) mobile phase liquid phase (less polar) Hexanes...