Freezing-Point Depression Equation Using Cryoscopic Constant
Freezing-point depression is the process in which adding a solute to a solvent decreases the freezing point of the solvent.
The freezing-point depression equals the product of the solution molarity and the cryoscopic constant.
Formula
![Copy to Clipboard QuantityVariable[Subscript["Δ​T", "f"], "TemperatureDifference"] == QuantityVariable["m", "Molality"]*QuantityVariable[Subscript["K", "f"], "MolalFreezingPointDepressionConstant"]](https://www.wolframcloud.com/objects/resourcesystem/marketplacestorage/resources/244/2443183b-2bd7-461f-908c-c357758388b3/Webpage/FormulaImage.png)
| symbol | description | physical quantity |
|---|---|---|
| Δ​Tf | freezing point depression | "TemperatureDifference" |
| m | solution molality | "Molality" |
| Kf | cryoscopic constant | "MolalFreezingPointDepressionConstant" |
Forms
Examples
Get the resource:
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| Out[1]= | ![]() |
Get the formula:
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Use some values:
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| Out[3]= |

![FormulaData[
ResourceObject[
"Freezing-Point Depression Equation Using Cryoscopic Constant"], \
{QuantityVariable[
\!\(\*SubscriptBox[\("\[CapitalDelta]\[InvisibleSpace]T"\), \
\("f"\)]\),"TemperatureDifference"] ->
Quantity[3.7`, "KelvinsDifference"]}]](images/244/2443183b-2bd7-461f-908c-c357758388b3-io-3-i.en.gif)