Raoult's law states: The vapour pressure of an ideal solution is directly dependent on the vapour pressure of each chemical component and the mole fraction of the component present in the solution. That's why the boiling point of a solution is always higher than that of the pure solvent. The dependence of the temperature difference (elevated boiling point) on the concentration of the solute can be determined using a suitabel apparatus.
Benefits
Perfect as demonstration and student experiment
Simplified implementation: all pre-settings already prepared
Data logging via tablet possible.
Flexible experimenting thanks to wireless data transmission
Tasks
Measure the increase in the boiling point of water as a function of the concentration of table salt, urea and hydroquinone.
Investigate the relationship between the increase in boiling point and the number of pellets.
Determine the molar mass of the solute from the relationship between the increase in boiling point and the concentration.