Question

Question 3 (b)
Pragya tested the solubility of three different substances at different temperatures and collected the data as given below (results are given in the following table, as grams of substance dissolved in 100 grams of water to form a saturated solution).

b. Pragya makes a saturated solution of potassium chloride in water at 353 K and leaves the solution to cool at room temperature. What would she observe as the solution cools? Explain.

Answer 1

For answering this question, you should know what is solubility, saturated solution and variation of solubility with temperature.
b. The amount of potassium chloride that should be dissolved in water to make a saturated solution increases with rise in temperature. Thus, as the solution cools, some of the crystals of potassium chloride will precipitate out of the solution.