Molarity & Dilution Calculator
Calculate molarity from mass, molar mass, and volume. Use the dilution equation M1V1 = M2V2. Or figure out how much solute to weigh for a target concentration.
Solution
Parameters
g
g/mol
L
Results
Molarity
1.000 M
Moles of solute
1.000 mol
Step-by-Step Calculation
1. Formula
2. Calculate moles
3. Calculate molarity
Reference Guide
Molarity
Molarity (M) is the number of moles of solute per liter of solution. It is the most common unit for solution concentration in chemistry.
Dilution Equation
When you dilute a solution, the number of moles of solute stays the same. This gives the dilution equation.
Solution Preparation
To prepare a solution of a specific molarity, calculate the required mass of solute: mass = M x V x molar mass.
Lab Tips
Always add solute to solvent, not the reverse. For acids, add acid to water ("do as you oughta, add acid to water"). Use a volumetric flask for precise volumes.
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