This page discusses colligative properties, particularly freezing point depression, and their practical applications like using salts to improve road safety by lowering ice melting points. Common salt...This page discusses colligative properties, particularly freezing point depression, and their practical applications like using salts to improve road safety by lowering ice melting points. Common salts include sodium chloride, calcium chloride, and magnesium chloride. The freezing point depression depends on solute concentration and is quantified by the molal freezing-point depression constant, Kf, unique to each solvent.