How could you separate a powdered mixture of Cr2O3 and CrCl3?
Solution:
One can easily separate Cr2O3 and CrCl3 by solubility method. Cr2O3 is highly soluble in water but CrCl3 is insoluble in cold water and very slightly soluble in hot water. Thus, mixture of Cr2O3 and CrCl3 is placed in cold water. All the Cr2O3 are dissolved in water and CrCl3 is separated in the form of precipitate.
Filtrate contains only Cr2O3 which can be further recovered by evaporation technique.