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Freezing Point Depression Formula

GoVan't Hoff equation for Depression in Freezing Point of electrolyte Formula

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The Depression in Freezing Point is the phenomena that describes why adding a solute to a solvent results in the lowering of the freezing point of the solvent. Check FAQs

ΔT f = k f \cdot m

ΔT_f - Depression in Freezing Point?k_f - Cryoscopic Constant?m - Molality?

Freezing Point Depression Example

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Here is how the Freezing Point Depression equation looks like with Values.

Here is how the Freezing Point Depression equation looks like with Units.

Here is how the Freezing Point Depression equation looks like.

285.0535 = 6.65 \cdot 1.79

285.0535K = 6.65K*kg/mol \cdot 1.79mol/kg

285.0535 = 6.65 \cdot 1.79

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Depression in Freezing Point » fx Freezing Point Depression

Freezing Point Depression Solution

Follow our step by step solution on how to calculate Freezing Point Depression?

FIRST Step Consider the formula

ΔT f = k f \cdot m

Next Step Substitute values of Variables

∴

ΔT f = 6.65K*kg/mol \cdot 1.79mol/kg

Next Step Prepare to Evaluate

∴

ΔT f = 6.65 \cdot 1.79

LAST Step Evaluate

∴

ΔT f = 285.0535K

Freezing Point Depression Formula Elements

Variables

Depression in Freezing Point

The Depression in Freezing Point is the phenomena that describes why adding a solute to a solvent results in the lowering of the freezing point of the solvent.

Symbol: ΔT_f

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Depression in Freezing Point

Cryoscopic Constant

The Cryoscopic Constant is described as the freezing point depression when a mole of non-volatile solute is dissolved in one kg of solvent.

Symbol: k_f

Measurement: Cryoscopic ConstantUnit: K*kg/mol

Note: Value should be greater than 0.

Formulas to find Cryoscopic Constant

Molality

Molality is defined as the total number of moles of solute per kilograms of solvent present in the solution.

Symbol: m

Measurement: MolalityUnit: mol/kg

Note: Value can be positive or negative.

Formulas to find Molality

Other Formulas to find Depression in Freezing Point

Go Van't Hoff equation for Depression in Freezing Point of electrolyte

ΔT f = i \cdot k f \cdot m

Other formulas in Depression in Freezing Point category

Go Osmotic Pressure for Non Electrolyte

π = c \cdot [R] \cdot T

Go Osmotic Pressure given Concentration of Two Substances

π = (C 1 + C 2) \cdot [R] \cdot T

Go Osmotic Pressure given Density of Solution

π = ρ sol \cdot [g] \cdot h

Go Osmotic Pressure given Depression in Freezing Point

π = \frac{ΔH fusion \cdot ΔT f \cdot T}{V m \cdot ({T fp}^{2})}

How to Evaluate Freezing Point Depression?

Freezing Point Depression evaluator uses Depression in Freezing Point = Cryoscopic Constant*Molality to evaluate the Depression in Freezing Point, Freezing point depression is the decrease of the freezing point of a solvent on the addition of a non-volatile solute. Depression in Freezing Point is denoted by ΔT_f symbol.

How to evaluate Freezing Point Depression using this online evaluator? To use this online evaluator for Freezing Point Depression, enter Cryoscopic Constant (k_f) & Molality (m) and hit the calculate button.

FAQs on Freezing Point Depression

What is the formula to find Freezing Point Depression?

The formula of Freezing Point Depression is expressed as Depression in Freezing Point = Cryoscopic Constant*Molality. Here is an example- 276.4669 = 6.65*1.79.

How to calculate Freezing Point Depression?

With Cryoscopic Constant (k_f) & Molality (m) we can find Freezing Point Depression using the formula - Depression in Freezing Point = Cryoscopic Constant*Molality.

What are the other ways to Calculate Depression in Freezing Point?

Here are the different ways to Calculate Depression in Freezing Point-

Depression in Freezing Point=Van't Hoff Factor*Cryoscopic Constant*Molality

Can the Freezing Point Depression be negative?

Yes, the Freezing Point Depression, measured in Temperature can be negative.

Which unit is used to measure Freezing Point Depression?

Freezing Point Depression is usually measured using the Kelvin[K] for Temperature. Celsius[K], Fahrenheit[K], Rankine[K] are the few other units in which Freezing Point Depression can be measured.

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