What is Mole Fraction?

Mole fraction is defined as,

Number of moles of component A in a mixture divided by the total number of moles of all the components in that mixture.

Mole fraction is one of the measurements of the concentration of the solution. The image given below tells the formula used to calculate the mole fraction.

The mole fraction is represented by the letter ‘X’. For example for a solution that has ‘a’ moles of solute and ‘b’ moles of the solvent the total moles in the solution is ‘a+b’. Now, the mole fraction of solute is X_solute = a / (a+b), similarly the mole fraction of solvent X_solvent  = b / (a+b). 

A Mole is a unit of measurement for measuring a larger number of substances such as molecules, atoms, and other particles in chemistry. One mole is equal to 6.02214076 × 10²³ values.

Mole fraction is one of the ways to represent the concentration of the solution. It is defined as the number of molecules of component A divided by the total number of molecules of all the components in the solution. Let’s learn about the mole fraction its formula and examples in this article.