Why does sodium chloride solution freeze at a lower temperature than water?
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Why does sodium chloride solution freeze at a lower temperature than water?
Upon adding a non-volatile solute like NaCl to water, the vapor pressure is lowered. The vapor pressure of this solution becomes equal to that of pure solid solvent which is the freezing point of the solution occurs at a lower temperature. Thus freezing point of NaCl solution is lower than that of pure solvent.
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