Raoult's Law Calculator

Calculate Solution Vapor Pressures with Precision

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Solution Vapor Pressure Calculator

Calculate the vapor pressure of a solution using Raoult's Law.

P solution: - mmHg

Mole Fraction Calculator

Calculate mole fractions from moles or masses of components.

X solvent: -
X solute: -

Partial Pressure Calculator

Calculate partial pressures in a mixture using Raoult's Law.

Partial Pressure: - mmHg

Understanding Raoult's Law

What is Raoult's Law?

Raoult's law states that the partial vapor pressure of each component in an ideal solution is equal to the vapor pressure of the pure component multiplied by its mole fraction in the solution.

Ideal vs. Real Solutions

Raoult's Law applies to ideal solutions. Real solutions may show deviations due to:

  • Molecular interactions
  • Temperature effects
  • Pressure effects

Applications

Raoult's Law is important for:

  • Distillation processes
  • Chemical separations
  • Solution behavior prediction

Essential Formulas

Raoult's Law

P solution = X solvent × P° solvent

Where:

  • P solution = Vapor pressure of solution
  • X solvent = Mole fraction of solvent
  • P° solvent = Vapor pressure of pure solvent

Mole Fraction

X = n component / n total