Question

Write the definition of mole fraction.

Hint:

Mole fraction is particularly useful for calculating the vapor pressure and boiling point elevation in solutions.

Answer 1

Step 1: Definition of Mole Fraction.
Mole fraction is the ratio of the number of moles of a component to the total number of moles of all components in the mixture. It is represented as: \[ x_i = \frac{n_i}{n_{\text{total}}} \] where \( x_i \) is the mole fraction of component \( i \), \( n_i \) is the number of moles of component \( i \), and \( n_{\text{total}} \) is the total number of moles of all components in the mixture.

Step 2: Conclusion.
Mole fraction is a unitless quantity and is often used in the calculation of colligative properties.