The ability of solute A to get dissolved in a solvent is called solubility.

Solubility is an important concept in chemistry that refers to the ability of a solute to dissolve in a solvent. It is a measure of how much solute can dissolve in a given amount of solvent at a specific temperature and pressure. The solubility of a substance depends on various factors such as the nature of the solute and solvent, temperature, and pressure.

Factors affecting solubility:
- Nature of the solute and solvent: Different substances have different solubilities due to the nature of their chemical structures. Polar solutes tend to dissolve in polar solvents, while nonpolar solutes dissolve in nonpolar solvents. For example, salt (a polar solute) dissolves in water (a polar solvent) but does not dissolve in oil (a nonpolar solvent).
- Temperature: Solubility generally increases with an increase in temperature for most solid solutes in liquid solvents. However, the solubility of gases generally decreases with increasing temperature. This is because the increased kinetic energy at higher temperatures allows for more effective collisions between solute particles and solvent molecules, leading to increased solubility.
- Pressure: The solubility of gases is also affected by pressure. As pressure increases, the solubility of gases increases. This is because the increased pressure forces more gas particles into the liquid, increasing the chances of them colliding with the solvent molecules and dissolving.

Importance of solubility:
- Solubility plays a crucial role in various chemical processes, such as dissolution, precipitation, and extraction. It helps determine the concentration of a solution, which is essential for chemical reactions and analysis.
- Solubility is also important in various industrial applications, such as pharmaceuticals, food and beverage production, and environmental science. It helps in the formulation of medicines, development of new materials, and removal of pollutants from water.
- Understanding solubility is crucial for scientists and researchers in fields such as chemistry, biology, and geology. It helps in studying the behavior of substances in different environments and enables the design and optimization of experiments and processes.

In conclusion, solubility refers to the ability of a solute to dissolve in a solvent. It is influenced by factors such as the nature of the solute and solvent, temperature, and pressure. Solubility is an important concept in chemistry and has various applications in different fields.