Share with your friends
Call
Due to colligative properties of solutions there is depression of freezing point of solution in comparison with pure solvent. It means that the freezing point of a pure solvent is lowered by the addition of a solute. Mathematical law for this phenomenon is ΔTF=KF·b·i (for ideal solutions) where ΔTF – the freezing point depression, ΔTF =TF (pure solvent) TF (solution). KF – the cryoscopic constant, which is dependent on the properties of the solvent. b – the molality (mol solute per kg of solvent) i – the van 't Hoff factor (number of ion particles per individual molecule of solute). For a more accurate calculation at a higher concentration, equation proposed by Ge and Wang should be used. It includes activity of solute which depends on concentration. So more solid solution – more freezing point depression and the time for crystallization of such solution will be increased. Answer: solution will not freeze more rapidly because you should cool it to lower temperature