Final answer:
Equi-molal solutions of nonelectrolytes affect colligative properties equally because they do not ionize in solution, contributing the same number of solute particles at equal concentrations.
Step-by-step explanation:
Equi-molality of any nonelectrolytes shows the exact same effect on colligative properties such as freezing point depression, boiling point elevation, and osmotic pressure. Molality, a measure of concentration, is the number of moles of solute per kilogram of solvent. Nonelectrolytes are substances that, when dissolved in water, do not produce ions.
Unlike electrolytes, which dissociate into ions and can alter colligative properties disproportionately, solutions of nonelectrolytes at equal molalities should demonstrate uniform changes in these properties due to the number of particles being equal. For example, the freezing point depression seen in solutions with equal molalities of different nonelectrolytes will be the same because they contribute an equal number of particles to the solution.