Question

How can I calculate solubility of potassium nitrate?

Answer 1

Hint Potassium nitrates is a solute component in a solution. Solubility is the maximum amount of substance dissolved in a specific volume of solvent.

Complete step by step solution:
So in the question it is asked to calculate the solubility of potassium nitrate. Before going to the solution part of the question, first we should know what solubility of a substance refers to. We use the solubility parameter for the solutions. Solutions are those homogeneous mixtures which are formed by the combination of two or more substances.
A solution consists of two components which is a solute and a solvent. Without these two components we cannot say a mixture as a solution. If only one component is present we call it a pure substance.
The solute is that substance which gets dissolved or distributed homogeneously in a medium.
The solvent is that substance in which the solute is getting dissolved. So solvent is the dissolving medium of the solution.
We generally refer to the solutions as those substances in liquid forms in which the solvent is in liquid form and the solute particles which are in solid phase are dissolved in the medium. But the solutions with solute and solvent having other physical states are also known.
And we refer to the solubility of the solution, as the maximum amount of the solute that can be dissolved in the given or known quantity of the solvent.
So here we have to find the solubility of potassium nitrate, but since no other data is given we could find the solubility only through doing the experiment and calculate the solubility with the aid of data obtained from the experiment or we have to interpolate from the solubility graph of potassium nitrate $ \left( KN{{O}_{3}} \right)$ . The graphical representation of solubility of $ KN{{O}_{3}}$ in water is as given below:


Note: If the temperature of the solution is increased i.e. if we give external heat through heating the solution then the solubility of the solution increases.
Since solubility increases with temperature, both the parameter is directly proportional to each other
If in the question solubility of the ions formed by the dissociation of potassium nitrate in the solution was given then we could find the solubility product as it is the product of the solubility of the ions formed.