大家已经比较清楚和熟悉稀溶液的依数性。然而这只是指非电解质溶液在浓度很稀的情况下,它的饱和蒸气压的降低,凝固点的下降,沸点的上升及渗透压均与溶液溶质的本性无关,而仅决定于溶质的量的多少,即所谓依数性,因而必有下式成立。 We have more clearly and familiar with the dilute solution by the number of. However, this only refers to the non-electrolyte solution in the case of very dilute concentration, the decrease of its saturated vapor pressure, the decline of the freezing point, the rise of the boiling point and the osmotic pressure have nothing to do with the nature of the solution solute, but only depends on the amount of solute , The so-called by the number of properties, which must have the following formula established.