basic

Mole Fraction from Two Vapour Pressure Measurements Calculator

Raoult's law: P_solution = x·P°₁ + (1−x)·P°₂.

Applies Raoult's law to a binary solution: P_total = x₁·P°₁ + x₂·P°₂. Calculates mole fractions x₁ and x₂ from the measured total vapour pressure and the two pure component vapour pressures.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

kPa
kPa
kPa

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

x₁ = (P_total − P°₂) / (P°₁ − P°₂)

In depth

Applies Raoult's law to a binary solution: P_total = x₁·P°₁ + x₂·P°₂. Calculates mole fractions x₁ and x₂ from the measured total vapour pressure and the two pure component vapour pressures.