Correct Option
The correct option is Solubility.
Explanation
A solution is a homogeneous mixture of two or more substances. The component present in the largest quantity is known as the solvent, while the component present in a smaller quantity is the solute. The capacity of a solvent to dissolve a solute depends on the nature of the substances, temperature, and pressure.
Option Analysis
- Solubility Solubility: Correct. Solubility is defined as the maximum amount of a solute that can be dissolved in a specified amount of solvent at a specific temperature. A solution that has reached this limit is called a saturated solution.
- Mole fraction Mole fraction: Incorrect. Mole fraction is a unit of concentration. It represents the ratio of the number of moles of a particular component to the total number of moles of the solution. It does not define the maximum limit of dissolution.
- Mass % Mass %: Incorrect. Mass % is another method of expressing concentration. It is defined as the mass of the solute divided by the total mass of the solution, multiplied by 100. It describes the composition of a solution, not the saturation limit.
- Formality Formality: Incorrect. Formality is a concentration unit used primarily for ionic compounds. It is defined as the number of formula mass units of solute per liter of solution. Like molarity, it measures concentration rather than the solubility limit.
Key Takeaway
Solubility is the specific property defining the saturation point of a solute in a solvent at a given temperature, whereas mole fraction, mass %, and formality are units used to express the concentration of a solution.