How are colligative properties determined?
You determine colligative properties by making measurements.
VAPOUR PRESSURE LOWERING
The vapor pressure lowering
BOILING POINT ELEVATION
To determine the boiling point, you use an apparatus like the one shown below. You heat the liquid and measure the temperature when it boils.
The boiling point elevation
FREEZING POINT DEPRESSION
To determine the freezing point, you place the solid in the apparatus shown below and warm the solid until it melts. Then you measure the temperature as it freezes.
The freezing point depression
You use a membrane osmometer to measure the osmotic pressure