Question

.Assertion: A saturated solution becomes super saturated on cooling. Reason: It is because solubility decreases with decreasing temperature.

Answer 1

Explanation:

Supersaturation is a state of a solution that contains more of the dissolved material than could be dissolved by the solvent under normal circumstances.

As a general rule, the more heat is added to a system, the more soluble a substance becomes. (There are exceptions where the opposite is true). Therefore, at high temperatures, more solute can be dissolved than at room temperature. If this solution were to be suddenly cooled at a rate faster than the rate of precipitation, the solution will become supersaturated until the solute precipitates to the temperature-determined saturation point. The precipitation or crystallization of the solute takes longer than the actual cooling time because the molecules need to meet up and form the precipitate without being knocked apart by water.

So, both the Assertion and Reason are correct and Reason is not the correct explanation of Assertion.

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Answer 2

Assertion and reason are correct. Reason is not the correct explanation of assertion.

• A solution that consists of more and more solute a as can have the ability to dissolve at that temperature. Such a solution is known as a saturated solution.
• saturation is a solution that depicts the state in which the solution comprises as much of the dissolved material as compared to the one dissolved by the solvent under normal conditions.
• More of the solute is dissolved in the solvent when. the temperature is increased that it can be dissolved at room temperature. From the solution, an extra amount of solute is taken out and the solution is cooled because it is crystallized.
• Solubility of some solutes increases with the increase in the temperature and solubility of some solute solubility with the increase in the temperature on supersaturation type of solute.
• The solubility of the solute has no connection with the supersaturation state of the saturated solution.

Hence, Assertion and reason are correct. Reason is not the correct explanation of assertion.