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Solutions — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistrySolutions3 Marks
Question
While considering boiling point elevation and freezing point depression a solution concentration is expressed in molality and not in molarity. Why?
✓

Answer

  • Boiling point elevation and freezing point depression involve temperature changes, ( $\Delta T _{ b }$ and $\Delta T _{ f }$ ).
  • Since molarity depends on temperature but molality is independent of temperature we use molality and not molarity in considering boiling point elevation and freezing point depression.

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