Humber Admissions Practice Test

Which method typically allows solute to dissolve into a solution more effectively?

1. Cooling the solution

2. Applying pressure and increasing temperature

3. Decreasing the volume of the solution

4. Adding more solvent than solute

The correct answer is: Applying pressure and increasing temperature

Applying pressure and increasing temperature is a highly effective method for enhancing the solubility of a solute in a solution. When temperature is increased, it usually provides additional energy to the molecules involved, allowing them to overcome intermolecular forces and interact more freely, which facilitates the dissolution process. Increasing pressure, particularly for gases, also significantly boosts solubility as it compresses the particles, resulting in more interactions between the solute and solvent. For instance, in carbonated drinks, increasing the pressure allows more carbon dioxide to dissolve in the liquid. Together, higher temperature and pressure can lead to greater solubility across various types of solutes. Conversely, cooling the solution typically reduces the kinetic energy of the molecules, making it harder for solute particles to break apart and dissolve, thus leading to lower solubility. Decreasing the volume of the solution does not inherently enhance the solute's ability to dissolve, as concentration dynamics can affect solubility in complex ways. Lastly, while adding more solvent than solute can improve the overall dispersal of the solute, it doesn't inherently increase the solubility of the solute itself. The combination of increased pressure and temperature, therefore, stands out as the most effective method for improving