Dissolution occurs when a solute dissolves in a solvent. The rate of dissolution is a measure of how fast a solute dissolves in a solvent.
Factors that affect the rate of dissolution of a solid solute include:
Particle size: If the solute is broken into smaller pieces, more of the surface area of the solute is exposed to the solvent. This increases the rate of dissolution.
Temperature: Increasing the temperature increases the movement of solute and solvent particles. This increases the rate of dissolution.
Stirring: Stirring the solute and solvent creates more contact between the solute and the solvent particles. This increases the rate of dissolution.
Answers a and b are incorrect because cooling the solid or solution would slow the movement of the particles and cause them to be less likely to interact.
Answer c is incorrect because if the solvent were dried up, there would be nothing for the solute to dissolve in.
Answer d is correct. Stirring the solid and the solution would increase the rate of dissolution by making it more likely that the solid particles would come in contact with the solvent particles.
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