Which of the following would increase the rate of solubility?

Stirring increases the rate of solubility by promoting the interaction between solute and solvent. When a mixture is stirred, it ensures that solute particles are evenly distributed throughout the solvent, which leads to a more rapid interaction. This helps in breaking down solute particles and allows them to interact with the solvent molecules more effectively.

In cases where a solid solute is added to a solvent, stirring helps disperse the solid particles, increasing the overall surface area that is exposed to the solvent. This can significantly enhance the rate at which the solid dissolves.

In contrast, decreasing temperature generally reduces the kinetic energy of the molecules, which can slow down the rate of solubility for most solids in liquids. Decreasing surface area and using larger particle sizes would hinder the dissolving process by limiting the amount of solute that can interact simultaneously with the solvent.