Courses
Courses for Kids
Free study material
Offline Centres
More
Store Icon
Store
seo-qna
SearchIcon
banner

How can I calculate freezing point depression of water?

Answer
VerifiedVerified
478.8k+ views
like imagedislike image
Hint: The general formula for water is H2O , where H is the chemical symbol for hydrogen, O is the chemical symbol for oxygen.

Complete step by step answer:
Molality is defined as the number of moles of solute which is dissolved in one kilogram of solvent. The term molality is denoted by the symbol m. The formula of molality is given below.
Molality =moles of solutekilograms of solvent
The formula for the calculation of freezing point depression of water is:
ΔTf=iKfm
Where, ΔTf is the freezing point depression
I is the van’t Hoff factor
And, Kf is the molal freezing point depression constant for the solvent
And m is the molality of the solution.
We can calculate the freezing point depression of water by using the above formula.

Additional Information :
To calculate molality from molarity we will require the density of the given substance. If the density is given then it is easy to calculate molality from molarity. Density is defined as mass per unit volume. With the use of density, we can calculate the kilograms of solvent using the litres of solution.
density=massvolume

Note: Do not get confused between the term molarity and molality. Molar solution is also known as molarity. Molarity is one of the standard expressions of solution concentration. The molar solution used the gram molecular weight of a solute in calculating molar concentration present in per litre of the solution. Molarity is denoted by the symbol M. The formula of molarity is given below:
molarity = moles of soluteliters of solution
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
calendar iconAcademic year 2025-26
language iconENGLISH
book iconUnlimited access till final school exam
tick
School Full course for CBSE students
PhysicsPhysics
ChemistryChemistry
MathsMaths
₹41,848 per year
Select and buy