Concept:Separation of two dissolved salts by solubility difference using fractional crystallization.
Explanation:Potassium chloride (
KCl) and potassium trioxochlorate(V),
KClO3, are both soluble solids in solution.
Fractional crystallization is used because
KClO3 is much more soluble in hot water than in cold water, while the solubility of
KCl changes only slightly with temperature.
On cooling the hot saturated solution,
KClO3 crystallizes out first, leaving
KCl in solution.
Answer:A. Fractional crystallization