Question

which of the following usually makes a substance dissolve faster in a solvent?
o stirring the solution
o increasing the particle size of the solute
o decreasing the number of particles
o lowering the temperature

Explanation:

To determine which action makes a substance dissolve faster, we analyze each option:

• Option "stirring the solution": Stirring increases the interaction between solute and solvent particles, speeding up dissolution.
• Option "increasing the particle size of the solute": Larger particles have less surface area relative to volume, slowing dissolution.
• Option "decreasing the number of particles": Fewer particles mean less interaction, slowing dissolution.
• Option "lowering the temperature": Lower temperature reduces particle kinetic energy, slowing dissolution.

So, stirring the solution is the correct choice.

Answer:

A. stirring the solution