Chemistry Formula
Molarity Formula
Expresses solution concentration as moles per liter.
Formula Summary
Molarity
Expresses solution concentration as moles per liter.
- Category
- Chemistry
- Equation
- M = n ÷ V
- Calculator
- Use Molarity Calculator →
Equation
M = n ÷ V
Variables
- M = molarity
- n = moles of solute
- V = solution volume in liters
How to Use This Formula
- Identify the known values from the problem statement.
- Convert all values into compatible units.
- Substitute the values into the equation and calculate the result.
- Check that the final answer has the correct unit and meaning.
Explanation
Molarity measures the concentration of a solution by showing how many moles of solute are present in one liter of solution.
Worked Example
A solution containing 2 moles of solute in 4 liters of solution has a molarity of 2 ÷ 4 = 0.5 M.
Common Mistakes
- Using milliliters instead of liters without conversion.
- Confusing moles of solute with mass of solute.
- Using solvent volume instead of total solution volume.
Applications
- Preparing laboratory solutions.
- Chemical reaction calculations.
- Determining solution concentrations in experiments.
Related Formulas
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C₁V₁ = C₂V₂
Relates concentration and volume before and after dilution.
Learn formula →Mole Fraction
Xᵢ = nᵢ ÷ nₜₒₜₐₗ
Finds a component's fraction of the total amount in a mixture.
Learn formula →Ideal Gas Law
PV = nRT
Relates pressure, volume, amount, and temperature of an ideal gas.
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