Mole Fraction
| Formula / Notation | x₁ = n₁ / Σnᵢ; Σxᵢ = 1; mol fraction of component i |
|---|---|
| Also Known As | Mol fraction, molar fraction, x_i, mole fraction of component |
What is Mole Fraction?
A dimensionless concentration unit defined as the ratio of the moles of one component to the total moles of all components in a mixture. Mole fractions range from 0 to 1 and always sum to 1 for all components. Used in Raoult's law and ideal gas mixture calculations.
Formula & Notation
Other Names / Synonyms: Mol fraction, molar fraction, x_i, mole fraction of component
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
A dimensionless concentration unit defined as the ratio of the moles of one component to the total moles of all components in a mixture. Mole fractions range from 0 to 1 and always sum to 1 for all components. Used in Raoult's law and ideal gas mixture calculations.
Mole fractions are used in: vapour-liquid equilibrium calculations (Raoult's law, Henry's law), computing activities in non-ideal solutions, expressing gas mixture compositions (atmospheric O₂: x = 0.2095), calculating partial pressures, and in chemical equilibrium expressions for Kp in gas-phase re…
Mole fraction of toxic or flammable gases in a mixture determines their partial pressure and hence their potential to cause harm. Knowing mole fraction allows calculation of partial pressure of a toxic gas in a mixture — essential for comparing to TLV (threshold limit value) occupational exposure st…
The formula or notation for Mole Fraction is: x₁ = n₁ / Σnᵢ; Σxᵢ = 1; mol fraction of component i