General Chemistry II: Ways to Express Solution Concentration

Solution Terminology

• A solution with a relatively large amount of solute is described as concentrated.
• The term concentration expresses the quantity of solute contained in a given amount of solution.

Solution Components

• The solute is the substance being dissolved in a solution.
• The amount of matter in an object is measured using the term mass.

Concentration Expressions

• When the solute is a solid, the concentration of a solution can be conveniently expressed using mass/volume percentage.
• The percentage of solute in a solution can be more easily determined by calculating the mass/volume percentage.

Concentration Calculation

• The formula used to calculate Mass/Volume percent is: (mass of solute / volume of solution) x 100%.

Concentration Measures

• Molarity is a measure of concentration that describes the number of moles of solute per liter of solution.
• Molality is a measure of concentration that describes the number of moles of solute per kilogram of solvent.
• Percent by Volume concentration is calculated by expressing the volume of solute as a percentage of the total volume of the solution.
• Molarity is the concentration measure that uses moles in its definition.

Test your knowledge on ways to express the concentration of a solution in General Chemistry II. Learn to define concentration, solve for percent concentration, molarity, and molality, and practice solving related problems.