Freezing point depression is simply the process of LOWERING THE FREEZING POINT OF A LIQUID by adding a solute to it.
Ordinarily, water freezes at 32°F (0°C), but can you add salt to lower its freezing point to 20°F (-6°C). That’s why we use salt to melt ice on the road in the winter!… Read the rest
Boiling point elevation is the elevation of a solid’s normal boiling point by adding a substance to it.
When you add a solute (such as salt or sugar) to a pure solvent (such as water), the boiling point of the liquid solvent is now increased.… Read the rest
Adding a solute to a pure solvent lowers the solvent’s vapor pressure. For example, water normally boils at 100ºC (212ºF) but if you add a substance like salt to the solution, it decreases the vapor pressure of the solution.
First, recall what the vapor pressure of a liquid is.… Read the rest
The characteristics of a solution such as the boiling point, freezing point and vapor pressure are known as colligative properties. Colligative properties apply only to solutions and not gases or solids.
COLLIGATIVE PROPERTIES ARE DEPENDENT ON THE NUMBER OF ATOMS AND MOLECULES
The word colligative comes from the same Latin root that the word collection comes from.… Read the rest