Mole Fraction Calculator

Enter the moles of solute and moles of sloven into the mole fraction calculator below. The mole fraction is a ratio of moles of solute to total moles.

Mole Fraction Formula

The following formula is used in the mole fraction calculator above:

Mole Fraction(Xi) = Moles of Solute / (Moles of Solute + Moles of Solvent)

  • Where Xi is the mole fraction as a ration, not a percent.

What is a mole fraction?

The mole fraction can be defined as the amount of moles of a solute divided by the total amount of moles of the solution. This can be see in the equation given above. A mole fraction can be converted into a mole percent, or molar percentage by multiplying the result of the mole fraction by 100.

Unlike molar concentration, the mole fraction is a ratio of moles to moles. A molar concentration is a ratio of moles to volume.

How to calculate a mole fraction

The following example is a step by step guide on how to calculate a mole fraction. This example follows the formula given above.

  1. First, the total amount of moles of solute and solvent need to be calculated. This can be done through measuring the mass and determining the number of moles per unit mas.
  2. The next step is to separate the solute and repeat step one.
  3. Finally, enter the information into the formula or calculator above.
  4. Analyze the results.
mole fraction calculator
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