The elevation in the boiling point of an aqueous solution of NaCl is 0 . 01 ° C . If its van't Hoff…

The elevation in the boiling point of an aqueous solution of NaCl is 0.01°C. If its van't Hoff factor is 1.92, the molality of NaCl solution is ___(Kb for water =0.52 K kg mol-1)
  1. 0.01 m
  2. 0.001 m
  3. 0.005 m
  4. 0.02 m

Solution

The elevation in boiling point is given by:

 ∆Tb=i×Kb×mm = ∆Tbi×Kbm=0.011.92×0.52=0.1 molal

Asked in: AP EAMCET 2019 (21 Apr Shift 2)

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