Mass percentage

Definition

Mass percentage is a way to express the concentration of a component in a mixture. It is calculated as the mass of the component divided by the total mass of the mixture, multiplied by 100%.

5 Must Know Facts For Your Next Test

1. Mass percentage is often used in chemistry to describe the composition of solutions.
2. The formula for mass percentage is: $\text{Mass Percentage} = \left( \frac{\text{mass of component}}{\text{total mass of mixture}} \right) \times 100$.
3. Mass percentage can be applied to both solid and liquid mixtures.
4. This unit allows for easy comparison between different mixtures and solutions.
5. Knowing the mass percentages of components in a solution helps predict physical properties like boiling point and density.

Review Questions

Related terms

Molarity:

A measure of concentration defined as moles of solute per liter of solution.

Molality:

A measure of concentration defined as moles of solute per kilogram of solvent.

% (v/v): % volume/volume, another way to express solution concentration, based on volumes rather than masses.