According to solubility concepts, which statement best describes the difference between a saturated solution and an unsaturated solution at a given temperature?

• A. A saturated solution always contains visible undissolved solute, while an unsaturated solution never can contain undissolved solute.
• B. A saturated solution has no dissolved solute, while an unsaturated solution contains dissolved solute.
• C. A saturated solution can dissolve more solute at that temperature, while an unsaturated solution cannot dissolve any more solute.
• D. A saturated solution contains the maximum amount of dissolved solute possible at that temperature, while an unsaturated solution contains less than that maximum.

Answer: (D)

Verified step by step guidance

1. Understand the concept of solubility: Solubility is the maximum amount of solute that can dissolve in a solvent at a specific temperature to form a stable solution.
2. Define a saturated solution: A saturated solution contains the maximum amount of dissolved solute that the solvent can hold at that temperature. Any additional solute will remain undissolved.
3. Define an unsaturated solution: An unsaturated solution contains less dissolved solute than the maximum amount possible at that temperature, meaning more solute can still dissolve.
4. Recognize that the presence or absence of visible undissolved solute is not a definitive criterion for saturation, as some saturated solutions may or may not show undissolved solute depending on conditions.
5. Conclude that the key difference is that a saturated solution is at equilibrium with the maximum dissolved solute, while an unsaturated solution has the capacity to dissolve more solute at the same temperature.