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Raoult's law facts for kids

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Simply put, Raoult's law states that the vapour pressure, of a binary solution, containing a non-volatile solute, is directly related to the mole fraction of solvent (i.e. volatile) in the solution.

Also, it states that the vapour pressure of each component in a binary solution containing volatile components is directly related to its respective mole fraction in the solution.

Relative going-down of vapour pressure is equal to mole fraction of non volatile and non-electrolytic solute. This is known as Raoult's law.

P-P(INITIAL)/P(INITIAL)=n(SOLUTE)/n(SOLVENT)

Images for kids

  • Raoultov zakon

    Vapor pressure of a binary solution that obeys Raoult's law. The black line shows the total vapor pressure as a function of the mole fraction of component B, and the two green lines are the partial pressures of the two components.

  • RaoultDeviationPressureDiagram

    Positive and negative deviations from Raoult's law. Maxima and minima in the curves (if present) correspond to azeotropes or constant boiling mixtures.

See also

Kids robot.svg In Spanish: Ley de Raoult para niños

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