Here's why:

* Salts are generally ionic compounds, meaning they have strong electrostatic interactions between their ions. These interactions are relatively unaffected by temperature changes.

* Gases become less soluble in water as temperature increases. This is because the increased kinetic energy of the gas molecules allows them to escape from the solution more easily.

* Liquids can exhibit varying responses to temperature. Some liquids become more soluble in water as temperature increases, while others become less soluble.

* Solids generally become more soluble in water as temperature increases. This is because the increased kinetic energy of the water molecules helps to break apart the attractive forces holding the solid together, allowing it to dissolve more readily.

However, it's important to note that even the solubility of salts can be slightly affected by temperature. While the change is often small, it's still a factor to consider in some applications.