An unsaturated solution differs from a saturated solution at a given temperature because it

Step 1: Analyze the question We are asked how an unsaturated solution differs from a saturated one at the same temperature.

Step 2: Key concepts

• Saturated solution: contains the maximum amount of solute that can dissolve at a given temperature. It is in equilibrium with undissolved solute and cannot dissolve any more.
• Unsaturated solution: contains less solute than the maximum possible at that temperature, so it can still dissolve more.

Step 3: Evaluate the options

• A. Cannot dissolve more solute: This describes a saturated solution, so it is wrong.
• B. Can hold more solute than it can actually dissolve: This is contradictory. If a solution can hold more solute, it can dissolve more of it.
• C. Can still dissolve more solute at given temperature: This is correct. The solution has not reached its solubility limit.
• D. Form crystal more easily on cooling: This is more typical of saturated or supersaturated solutions, so it is wrong.

Step 4: Answer The correct option is C.

Exam tip: Remember the order "Un-sat → Sat → Super-sat":

• Unsaturated: can take more solute.
• Saturated: has reached its limit.
• Supersaturated: holds more than the limit, and is unstable.