What is a supersaturated solution?
A statement to the effect that the..........
I just saw this and I thought I should emphasize it, because an examiner would rightly reject this definition. Saturation describes an equilibrium condition, viz. that the solution contains the same amount of solute that would be in equilibrium with undissolved solute.
For a salt (or solute),
Now there is a solubility product,
And the solution is
I reiterate that a statement to the effect that
A supersaturated solution may be formed by heating the solution with excess solute, and cooling very carefully. This metastable solution may be brought back to saturation (to equilibrium) by introducing a seed crystal or scratching the container with resultant precipitation of a mass of crystals from solution. This is the basis for many spectacular classroom demonstrations of supersaturation (usually with sodium thiosulfate).