Question

Normally, the solubility of crystalline solid increases with temperature. Does it increase uniformly in all cases? Name a substance whose solubility increases rapidly with temperature.

Answer 1

Hint : We know that solution is a homogeneous mixture of two or more solutes in a solvent. In short we can say that a solution is made up of solute and solvent where solute is that substance which gets dissolved and solvent in which it gets dissolved and both make a solution.

Complete Step By Step Answer:
Solubility can be defined as the maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature. It is not necessary that solute is of liquid nature; it can exist in any state of matter, i.e. it can be solid, liquid or gas. There are many factors which affect the solubility of a solution. The solubility of a substance is dependent upon the physical and chemical properties of that substance. Solubility generally depends on the temperature, pressure and forces between the particles. Solubility of a solution can also be changed by changing the temperature. By changing temperature we can increase the solubility of a solute. We know that water dissolves solutes at or. Whereas sparingly soluble solid or liquid substances can be dissolved completely by increasing the temperature to some higher range. But in the case of gaseous substance temperature inversely acting on the solubility factor i.e. as the temperature increases gases expand and escape from their solvent.
Thus, Solubility often depends on temperature and this solubility increases with increasing temperature. Many salts show a large increase in solubility with temperature but it is not uniform. Potassium nitrate is a substance whose solubility increases rapidly with temperature.

Note :
Remember that when talking about chemical solutions, the term supersaturated means that a solution contains more of a solute that can be dissolved in it. This usually makes some of the solutes separate from the solution. This can be attained by various methods like compression or exceeding the temperature exponentially.