The elevation in boiling point of a solution is 13.44 g of CuCl2 in 1 kg of water using the following information will be (molecular weight of CuCl2 =134.4 and Kb= 0.52 Km-1).

CuCl2 is an electrolyte, which ionises in solution as follows                                               CuCl2⇋ Cu2++2Cl- At t=0                   1 mol            0           0 After ionisation    (1-α)mol    α mol   2α molThus, number of particles after ionisation                 =1-α+α+2α=1+2α∴van't Hoff factor      i=number of particles after ionisationnumber of particles before ionisationor i=1+2α1                     on 100% ionisation α=1      =1+2×11=3The elevation in boiling point (when colligative property is abnormal)          ∆Tb=i×Kb×m    m-molality of solution  Molality of CuCl2 solution                               =Weight of CuCl2 (in gram)molecular weight of CuCl2Weight of water (solvent) in kg =13.4413.441=0.1 m Thus, ∆Tb=3×0.52×0.1-0.156-0.16oC