问答题
A solution containing 3.24 g of a nonvolatile nonelectrolyte dissolved in 500 g of water freezes at - 0. 465℃. Determine the molecular weight of the solute.
【正确答案】Δt =Km m=Δt/K = 0.465℃/1.86℃/m = 0.250 m = 0.250 mol/kg solvent 6.35 g solute/500 g solute= 12.7 solute/kg solvent MW=12.7 g/0.250 mol=50.8 g/mol