What effect does a solute have on the freezing and boiling points of the solution?

1 Answer
Jul 6, 2016

The phenomena of #"boiling point elevation"# and #"freezing point depression"# are well known.


Both phenomena are colligative properties, that depend on the number of particles of solute in solution. Colligative properties include boiling point elevation and vapour pressure depression, osmotic pressures, and freezing point depression. Ionic solutes, that are presumed to speciate in solution, i.e. form solvated #M^+# and #X^-# ions, usually have twice the effect of a non-electrolyte at extreme dilution.

What sort of effect is exploited when salt is scattered on icy roads during winter?