Solubility indicates the maximum amount of a substance that can be dissolved in a solvent at a given temperature. Such a solution is called saturated.
Since the solubility is temperature-dependent there should be uniform temperature throughout the system when dissolving substances.
Solubility is measured either in grams per 100 g of solvent g/100g or number of moles per 1 L of the solution
Formula to calculate solubility.
![How to Calculate Solubility.](https://www.learntocalculate.com/wp-content/uploads/2021/01/Ksp.png)
- Ksp is the solubility product constant
- A+ is the cation in an aqueous solution
- B- is the anion in an aqueous solution
- a, b are the relative concentrations of a and b
Example:
Calculate the solubility of sodium nitrate, if 22 g of the salt is dissolved in 25 g of water.
Since we know the amount of sodium nitrate that dissolves in 25 grams of water, we can easily calculate its solubility in 100g of water.
![How to Calculate Solubility.](https://www.learntocalculate.com/wp-content/uploads/2021/01/solubility.png)
Therefore, the solubility of sodium nitrate is 88 g/100 g.