Variables
Description
What is this formula?
Molarity is one of the most widely used concentration units in analytical chemistry. It expresses the amount of solute in moles dissolved per unit volume of solution.
When to use it
Use this formula when preparing laboratory solutions, performing stoichiometric calculations, titrations, reaction yield calculations, and chemical equilibrium analyses.
Example
A laboratory technician dissolves 0.50 mol of sodium chloride in enough water to prepare 2.00 L of solution.
Data:
n = 0.50 mol
V = 2.00 L
Formula:
M = n/V
Substitution:
M = 0.50 / 2.00
Result:
M = 0.25 mol/L
The solution has a molarity of 0.25 M.
Applications
- Preparation of standard solutions
- Acid-base titrations
- Chemical equilibrium calculations
- Reaction stoichiometry
- Analytical chemistry laboratories
- Industrial chemical processes