Mole Fraction Calculator

What is Mole Fraction?

Mole fraction is a way of expressing the concentration of a component in a mixture. It is defined as the ratio of the number of moles of a particular component to the total number of moles of all components in the mixture.

Formula

The mole fraction of component A (X_A) is calculated as:

Properties

• The sum of all mole fractions in a mixture is always equal to 1.
• Mole fraction is dimensionless (has no units).
• It is temperature-independent, unlike molarity.
• Useful in calculations involving partial pressures and vapor pressures.

Applications

• Raoult’s Law calculations for ideal solutions
• Colligative property calculations
• Gas mixture calculations
• Chemical equilibrium calculations