Question

Prove that delta tf is a colligative property?

Answer 1

Answer:Delta tf is a colligative property

Explanation:

-Colligative properties are those properties which basically depends upon the ratio of number of solute particles to that of number of solvent particles. As Delta tf numerically is proportional to molality of the solution

-Molality is the number of moles of solute to the mass of solvent and hence Delta tf is colligative.

- Colligative properties depends upon mass and not nature.

Answer 2

Answer: depression in freezing point is an colligative property:-

Explanation:

ΔT f = T° - T^

Δ T f = K f X m

Where m = molality of the solution.

Δ T f = K f X mass of solute / molecular mass of solute X 1000/ mass of solvent

As colligative properties are those properties of dilute solution which depend upon number of particles instead of nature of particles.

So, Δ T f is directly proportional to the molality of the solution which indicates that depression in freezing point depends upon number of particles and hence it is an colligative property.