Which of the following would increase the rate of dissolution of a solid in a solution?  a. cool only the solid,  b. cool the solid and the solution,  c. dry up the solvent, or  d. stir the solid and solution                

Expert Answers

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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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