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Boiling point elevation - Raoult's law

Boiling point elevation - Raoult's law

Item no.: P3021001

Experiment Type: Teacher Experiment, Laboratory Experiment

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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 suitable apparatus.


  • Simple presentation and execution by temperature meter 4-2
  • Simultaneous display of current temperature and temperature difference
  • Compact, easily transportable setup


  1. Measure the increase in the boiling point of water as a function of the concentration of table salt, urea and hydroquinone.
  2. Investigate the relationship between the increase in boiling point and the number of pellets.
  3. Determine the molar mass of the solute from the relationship between the increase in boiling point and the concentration.

What you can learn about

  • Raoult's law
  • Henry's law
  • Ebullioscopic constants
  • Chemical potential
  • Gibbs-Helmholtz equation
  • Concentration ratio
  • Degree of dissociation

Necessary accessories

  • Precision balance 620g/0.001g


Document     Filesize
p3021001e.pdf Experiment guide, English 236.69 KB

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