Created By : Rina Nayak

Reviewed By : Rajashekhar Valipishetty

Last Updated : May 12, 2023

Make use of our feezing point depression calculator tool that helps you to determine the change in the freezing point temperature of a solution compared to the pure solvent. To use this calculator tool, just provide the inputs in the field of inputs and click on the calculate button which is in blue color, so that you will get the results immediately.

Solvent (Optional):
Freezing point depression constant:
Freezing point of pure solvent:
Freezing point of solution:

What is Freezing Point Depression

Freezing point depression is the temperature at which the solid solvent and liquid solvent are in balance so that the vapor pressures get equal. When a non-volatile solute is added to the volatile liquid solvent then the solution of vapor pressure is lower than that of the pure solvent.

Look into the formula that we can use to calculate the freezing point depression.

Freezing point depression = Molal freezing point constant*Molality

ΔTf = Kf*m

How do you Calculate the Freezing Point of Depression?

For calculating the freezing point depression you can follow the steps that are given below.

  • The main thing you need to do is take the values that were given in the problem.
  • Determine the values of freezing point constant and molality.
  • Then, apply the formula, i.e. ΔTf = Kf*m.
  • Substitute the values and simplify them.
  • Finally, you will get a freezing point depression value.


Question: Find the freezing point depression if the freezing point constant is 120 KKPm and molality is 0.023?


Given values are, Kf = 120KKPm

m = 0.023

Apply the formula,

ΔTf = Kf*m

ΔTf = 120 * 0.023

ΔTf = -270.39 C

Therefore, the value of the freezing point constant is -270.39 Celsius.

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FAQs on Freezing Point Depression

1. What are the steps to calculate the Freezing Point Depression?

Below are the steps to calculate the freezing point depression.

  • Initially, give the inputs in the input fields.
  • Then, click on the calculate button.
  • Finally, get the answer easily.

2. How do you Calculate the freezing point of depression?

You can calculate the freezing point depression by using the formula, ΔTf = Kf*m.

3. What is freezing point depression?

Freezing point depression is a measure of the energy required to keep the liquid state solution.