Question

Which of the following will speed up the dissolving of a solid solute in water?


freeze the solution


grind up the solvent


cool the solution


heat the solution

Answer 1

Heat the solution.

Raising the temperature increases the kinetic energy of the water and solute particles, causing more frequent and energetic collisions and usually increasing solubility, so the solid dissolves faster. (Grinding the solute — not the solvent — would also speed dissolving by increasing surface area.)