Properties of Solutions

 

60) m1 = 5.00 g la      m2 = 0.100 kg C6H6      Tf = 4.1°C      Tf° = 5.5°C      Kf = 5.12°C/m

      

      ΔTf = Kf x m x i

      ΔTf = Tf° - Tf = Kf x m x i

      5.5°C - 4.1°C = 5.12°C/m x m x i

      1.4°C = 5.12°C/m x m x 1

      m = 0.27  m

 

      m = n/kg

      n = m x kg = 0.27 m x 0.100 kg = 0.027 mol la

      MM = m/n = 5.00 g/0.027 mol = 180 g/mol