Final answer:
When more solute is added to a solution, the freezing point decreases due to freezing point depression. The presence of solute particles disrupts the ordering process of solvent particles, requiring more energy to freeze the solution.
Step-by-step explanation:
The freezing point of a solution decreases when more solute is added. This phenomenon is known as freezing point depression. The presence of solute particles interferes with the process of solvent particles coming together to form a solid phase, requiring more energy to be removed from the solution in order to freeze it. The amount of decrease in the freezing point depends on the molality of the solute.