What factors affect dissolving rates?

Factors that affect dissolving rates are:

• 1. Surface area
• 2. Stirring
• 3. Temperature

The greater the $\textbf{surface area}$ of a solid solute, the collision between solute and solvent particles occurs more frequently resulting in a faster rate of dissolving. This means that if we want a solid solute to dissolve faster we need to increase the surface area (i.e. using granulated sugar instead of a sugar cube).

$\textbf{Stirring}$ moves dissolved particles away from the surface of the undissolved solid solute, which increases the collision rate between the solute and solvent particles.

Increasing the $\textbf{temperature}$ of a solvent causes its particles to move faster. This increases the number of collisions as well as the energy of collision between solute and solvent particles.