Chapter 16, Problem 80A

Interpretation Introduction

Interpretation: It is to be proved experimentally if the given ${\text{KNO}}_{\text{3}}$ solution is saturated, unsaturated, or supersaturated.

Concept Introduction:

The saturation of a solution depends on the concentration of solute added to the solvent at a given temperature and pressure.

• Saturated solution − This solution contains the maximum amount of solute for the given solvent.
• Unsaturated solution − This solution contains less solute compared to a saturated solution, and this can take in more solute.
• Supersaturated solution − This solution contains more solute than the actual capacity and it can’t take up more.

Explanation of Solution

• By adding a few drops of ${\text{KNO}}_{\text{3}}$ to clear solution. If the solution shows slight coloration, then the solution is saturated. Meaning it can’t take up any more solute ( ${\text{KNO}}_{\text{3}}$).
• To the clear solution given few drops of ${\text{KNO}}_{\text{3}}$ is added, if the solution remains clear the solution is said to be unsaturated. Meaning it can take up solute ( ${\text{KNO}}_{\text{3}}$).
• If the solution starts forming crystals at the bottom, the solution is said to be supersaturated. No more solute can be dissolved in the solvent.