In a solution, what happens when you introduce more solute to an unsaturated solution?

When more solute is added to an unsaturated solution, the solute dissolves completely in the solvent until the solution reaches the point of saturation. An unsaturated solution is one that has not yet reached its maximum capacity of dissolved solute at a given temperature and pressure; therefore, additional solute will continue to dissolve. As more solute molecules interact with the solvent molecules, the solute particles are surrounded by the solvent and become integrated into the solution, leading to a homogenous mixture. This process continues until the solution can no longer accommodate more of the solute, at which point it would become saturated.

The other answer choices do not accurately describe the behavior of solute in an unsaturated solution. Solute sinking to the bottom implies an inability to dissolve, while crystallization would occur in a saturated solution when excess solute starts to solidify. Reacting with the solvent implies a chemical change, which is not a characteristic of solvation in a simple solution.