Raoults Law Calculator

Raoult's Law Calculator

Estimate solution vapor pressure for ideal mixtures.

2026-05-06T10:07:27.254Z
atm
χ

Solution Vapor Pressure (P_sol)

0.5000 atm

P_sol = χ_solvent × P°

What is Raoult's Law?

Raoult's law states that the partial vapor pressure of each component in an ideal solution equals the vapor pressure of the pure component times its mole fraction.

How to use

Provide the pure solvent vapor pressure and the mole fraction of the solvent (0–1). The calculator shows the solution vapor pressure for ideal behaviour.

Example

Pure solvent vapor pressure 1 atm, solvent mole fraction 0.8 → P_sol = 0.8 atm.

FAQs

Q: Is non-ideal behaviour included? A: No — Raoult's law applies to ideal solutions. Q: Units? A: Pressure in atm.

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