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Multiple Choice
Which statement best distinguishes a saturated solution from a supersaturated solution?
A
A saturated solution contains undissolved solute at the bottom, while a supersaturated solution contains no solute at all.
B
A saturated solution can dissolve more solute if stirred, while a supersaturated solution cannot dissolve any more solute.
C
A saturated solution contains the maximum amount of solute that can dissolve at a given temperature, while a supersaturated solution contains more dissolved solute than is normally possible at that temperature.
D
A saturated solution is always unstable, while a supersaturated solution is always stable.
Verified step by step guidance
1
Step 1: Understand the definition of a saturated solution. A saturated solution contains the maximum amount of solute that can dissolve in a solvent at a specific temperature, meaning no more solute can dissolve under those conditions.
Step 2: Recognize that in a saturated solution, any additional solute added will remain undissolved, often visible as solid at the bottom of the container.
Step 3: Learn about a supersaturated solution. This is a solution that temporarily contains more dissolved solute than the saturation limit at a given temperature, achieved by changing conditions such as cooling a saturated solution without disturbing it.
Step 4: Note that a supersaturated solution is unstable and can precipitate excess solute if disturbed, unlike a saturated solution which is at equilibrium.
Step 5: Compare the two: a saturated solution is at equilibrium with undissolved solute present, while a supersaturated solution contains more dissolved solute than normally possible and is metastable.