Question

What would you observe when (a) a saturated solution of KCl prepared at 60^o C is allowed to cool to room temperature (b) an aqueous sugar solution is heated to dryness.

Answer 1

(a) Here the solution is a saturated solution of KCl prepared at 60C which is above the room temperature. Hence when it is allowed to cool at room temperature some of the potassium chloride will settle down at the bottom, because saturation decreases with decrease in temperature.

(b) When an aqueous solution of sugar is heated to dryness, the sugar will be left behind in the container after the vaporization of water. The sugar left in the container may be charred because of more heating.