1.00 ~g of non-eletrolyte solute (molar mass 250 ~g ~mol ⁻¹ ) was dissolved in 51.2 ~g of benzene. If the freezing point depression constant, K _f of benzene is 5.12 K kg mol ⁻¹ , the freezing point of benzene will be lowered by:

Step-by-step solution

Molality of a non-electrolyte solute aligned & weight of solute in gram molecular weight of solute weight of solvent in kg & = 1 250 0.0512 = 1 250 0.0512 & =0.0781 ~m T _f & =k_f molality of solution & =5.12 0.0781=0.4 ~K aligned