When a solution is supersaturated, what can typically be observed?

A supersaturated solution is one that contains more solute than would normally be soluble at a given temperature and pressure. In this state, the solution has been manipulated—usually by heating and then carefully cooling—to dissolve more solute than what typically dissolves at that temperature.

When cooling, the solute does not immediately precipitate out unless disturbed, which is why a supersaturated solution can exist. This characteristic of holding more solute than normally possible is the defining trait of supersaturation. If disturbed or introduced to a seed crystal, the excess solute can rapidly crystallize out of the solution.

The other options do not accurately describe the nature of a supersaturated solution. A would suggest a chemical nature that doesn't pertain specifically to saturation levels. C implies a lack of solute concentration, which contradicts the very concept of supersaturation. D suggests that the solution is at a limit when it is actually beyond that limit, making option B the only accurate representation of a supersaturated solution.