Question

Are "unsaturated", "saturated" and "supersaturated" examples of variable composition?

Answer 1

A solution is a molecularly homogeneous combination of two or more pure substances, the composition of which can change within specified limitations. The solute and the solvent are two components (substances) in a solution. When the solvent makes up the majority of the combination, as is often the case, the solution takes on the state of the solvent. The concentration of a solution, which is a measure of the quantity of solute in a given amount of solution or solvent, is an essential metric.

Complete answer:
A saturated solution contains the greatest quantity of solute that can be dissolved under the given conditions.
Unsaturated solutions have a dissolved solute concentration that is less than the solvent's saturation point (at that specific temperature gradient).
A supersaturated solution has more dissolved solute than a saturated solution, and it may be made by boiling a saturated solution, adding additional solute, and then gradually cooling it. Excess dissolved solute crystallises when a few crystals of the solute are seeded into a supersaturated solution.
Yes, they are now, to answer the question.
The highest quantity of solute is found in a saturated solution. The quantity of solute in an unsaturated solution is less than the maximum amount. In a given volume of solvent, a supersaturated solution contains more than the maximum quantity of solid. As a result, the concentration of the solute varies in each solution. This illustrates a solution's variable composition.

Note:
The entropy of mixing is positive in all solutions. Interactions between various molecules may or may not be energetically advantageous. If interactions are unfavourable, the free energy falls as the concentration of solutes rises. The solution is considered to be saturated when energy loss surpasses entropy gain and no more solute particles can be dissolved. However, changing environmental variables such as temperature, pressure, and pollution can dramatically alter the point at which a solution becomes saturated. A supersaturated solution may be made for some solute-solvent combinations by increasing the solubility to dissolve more solute and then decreasing it.