define cryoscopic constant
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The last thing we need to know is the cryoscopic constant (Kf). The cryoscopic constant is different for every solvent since it depends on the properties of the solvent. For example, the cryoscopic constant for water equals 1.853 K*kg/mol, and for acetic acid (vinegar) it is 3.90 K*kg/mol.
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The depression in freezing point observed in 1 molal solution containing non-volatile solute is called" cryoscopic constant "(Kf).
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