Chemistry

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The freezing point of ethanol is -114.6 deg Celsius and its Kf value is 2.00degC/m. What is the freezing point for a solution prepared by dissolving 50.0g of glycerin in 200g ethanol?

I thought it may have been using the formula deltaT=Kf*m, but I'm not sure.

  • Chemistry -

    You have it right.
    dT = 2.00*m

    You need m. That is
    m = mols/kg solvent and you can get mols by mol = grams/molar mass

    After you have dT then subtract from normal freezing point to obtain new freezing point.

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