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Molal Freezing Point Lowering Constant Formula

GoMolal Freezing Point Constant given Freezing Point Depression Formula

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Molal freezing point constant, also known as cryoscopic constant is dependent on the properties of the solvent, not the solute. Check FAQs

K f = \frac{[R] \cdot ({T fp}^{2}) \cdot MW}{ΔH f \cdot 1000}

K_f - Molal freezing point constant?T_fp - Solvent Freezing Point?MW - Molecular Weight?ΔH_f - Molal Heat of Fusion?[R] - Universal gas constant?

Molal Freezing Point Lowering Constant Example

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Here is how the Molal Freezing Point Lowering Constant equation looks like with Values.

Here is how the Molal Freezing Point Lowering Constant equation looks like with Units.

Here is how the Molal Freezing Point Lowering Constant equation looks like.

9.2241 = \frac{8.3145 \cdot (430^{2}) \cdot 1.2}{200 \cdot 1000}

9.2241K*kg/mol = \frac{8.3145 \cdot ({430K}^{2}) \cdot 1.2kg}{200J/mol \cdot 1000}

9.2241 = \frac{8.3145 \cdot (430^{2}) \cdot 1.2}{200 \cdot 1000}

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Depression in Freezing Point » fx Molal Freezing Point Lowering Constant

Molal Freezing Point Lowering Constant Solution

Follow our step by step solution on how to calculate Molal Freezing Point Lowering Constant?

FIRST Step Consider the formula

K f = \frac{[R] \cdot ({T fp}^{2}) \cdot MW}{ΔH f \cdot 1000}

Next Step Substitute values of Variables

∴

K f = \frac{[R] \cdot ({430K}^{2}) \cdot 1.2kg}{200J/mol \cdot 1000}

Next Step Substitute values of Constants

∴

K f = \frac{8.3145 \cdot ({430K}^{2}) \cdot 1.2kg}{200J/mol \cdot 1000}

Next Step Prepare to Evaluate

∴

K f = \frac{8.3145 \cdot (430^{2}) \cdot 1.2}{200 \cdot 1000}

Next Step Evaluate

∴

K f = 9.2240648285792K*kg/mol

LAST Step Rounding Answer

∴

K f = 9.2241K*kg/mol

Molal Freezing Point Lowering Constant Formula Elements

Variables

Constants

Molal freezing point constant

Molal freezing point constant, also known as cryoscopic constant is dependent on the properties of the solvent, not the solute.

Symbol: K_f

Measurement: Cryoscopic ConstantUnit: K*kg/mol

Note: Value can be positive or negative.

Formulas to find Molal freezing point constant

Solvent Freezing Point

Solvent Freezing Point is the temperature at which the solvent freezes from liquid to solid state.

Symbol: T_fp

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Solvent Freezing Point

Molecular Weight

Molecular Weight is the mass of a given molecule.

Symbol: MW

Measurement: WeightUnit: kg

Note: Value can be positive or negative.

Formulas to find Molecular Weight

Molal Heat of Fusion

Molal Heat of Fusion is the amount of energy needed to change one mole of a substance from the solid phase to the liquid phase at constant temperature and pressure.

Symbol: ΔH_f

Measurement: Energy Per MoleUnit: J/mol

Note: Value can be positive or negative.

Formulas to find Molal Heat of Fusion

Universal gas constant

Universal gas constant is a fundamental physical constant that appears in the ideal gas law, relating the pressure, volume, and temperature of an ideal gas.

Symbol: [R]

Value: 8.31446261815324

Other Formulas to find Molal freezing point constant

Go Molal Freezing Point Constant given Freezing Point Depression

K f = \frac{ΔT f}{m}

Other formulas in Depression in Freezing Point category

Go Depression in Freezing Point of Solvent

ΔT f = k f \cdot m

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

ΔT f = i \cdot k f \cdot m

Go Molality given Depression in Freezing Point

m = \frac{ΔT f}{k f \cdot i}

Go Cryoscopic Constant given Molar Enthalpy of Fusion

k f = \frac{[R] \cdot T fp \cdot T fp \cdot M solvent}{1000 \cdot ΔH fusion}

How to Evaluate Molal Freezing Point Lowering Constant?

Molal Freezing Point Lowering Constant evaluator uses Molal freezing point constant = ([R]*(Solvent Freezing Point^2)*Molecular Weight)/(Molal Heat of Fusion*1000) to evaluate the Molal freezing point constant, The Molal Freezing Point Lowering Constant, also known as the cryoscopic constant is dependent on the properties of the solvent, not the solute. Molal freezing point constant is denoted by K_f symbol.

How to evaluate Molal Freezing Point Lowering Constant using this online evaluator? To use this online evaluator for Molal Freezing Point Lowering Constant, enter Solvent Freezing Point (T_fp), Molecular Weight (MW) & Molal Heat of Fusion (ΔH_f) and hit the calculate button.

FAQs on Molal Freezing Point Lowering Constant

What is the formula to find Molal Freezing Point Lowering Constant?

The formula of Molal Freezing Point Lowering Constant is expressed as Molal freezing point constant = ([R]*(Solvent Freezing Point^2)*Molecular Weight)/(Molal Heat of Fusion*1000). Here is an example- 9.224065 = ([R]*(430^2)*1.2)/(200*1000).

How to calculate Molal Freezing Point Lowering Constant?

With Solvent Freezing Point (T_fp), Molecular Weight (MW) & Molal Heat of Fusion (ΔH_f) we can find Molal Freezing Point Lowering Constant using the formula - Molal freezing point constant = ([R]*(Solvent Freezing Point^2)*Molecular Weight)/(Molal Heat of Fusion*1000). This formula also uses Universal gas constant .

What are the other ways to Calculate Molal freezing point constant?

Here are the different ways to Calculate Molal freezing point constant-

Molal freezing point constant=Depression in Freezing Point/Molality

Can the Molal Freezing Point Lowering Constant be negative?

Yes, the Molal Freezing Point Lowering Constant, measured in Cryoscopic Constant can be negative.

Which unit is used to measure Molal Freezing Point Lowering Constant?

Molal Freezing Point Lowering Constant is usually measured using the Kelvin Kilogram per Mole[K*kg/mol] for Cryoscopic Constant. Kelvin Gram per Mole[K*kg/mol] are the few other units in which Molal Freezing Point Lowering Constant can be measured.

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Molal Freezing Point Lowering Constant Formula

​GoMolal Freezing Point Constant given Freezing Point Depression Formula

Molal Freezing Point Lowering Constant Example

Molal Freezing Point Lowering Constant Solution

Molal Freezing Point Lowering Constant Formula Elements

Other Formulas to find Molal freezing point constant

Other formulas in Depression in Freezing Point category

How to Evaluate Molal Freezing Point Lowering Constant?

FAQs on Molal Freezing Point Lowering Constant

Variable Name

GoMolal Freezing Point Constant given Freezing Point Depression Formula