Molarity Calculator
Calculate molar concentration (M) from mass concentration or mass/volume. Essential for solution chemistry and stoichiometry
Calculate Molarity (M)
Formula: HCl
Molar Mass: 36.458 g/mol
Mass of solute per unit volume of solution
Molarity Results
Calculation Details
Given: Concentration = 0.000 g/L, Molar Mass = 36.458 g/mol
Formula: Molarity = Mass Concentration ÷ Molar Mass
Calculation: 0.0000 M = 0.000 g/L ÷ 36.458 g/mol
Concentration Analysis
Example Calculation
HCl Solution Example
Problem: Calculate molarity of 5 g HCl dissolved in 1.2 L solution
Given: Mass = 5 g, Volume = 1.2 L, HCl molar mass = 36.458 g/mol
Step-by-Step Solution
Step 1: Calculate mass concentration: 5 g ÷ 1.2 L = 4.167 g/L
Step 2: Apply molarity formula: M = concentration ÷ molar mass
Step 3: M = 4.167 g/L ÷ 36.458 g/mol = 0.114 M
Answer: The molarity is 0.114 M (dilute solution)
Concentration Ranges
Very Dilute
< 0.001 M
Environmental, trace analysis
Dilute
0.001 - 0.1 M
Biological solutions
Moderate
0.1 - 1.0 M
Laboratory solutions
Concentrated
1.0 - 10 M
Strong reagents
Highly Concentrated
> 10 M
Industrial grade
Key Formulas
Molarity
M = n / V
moles per liter
From Concentration
M = C / MM
concentration ÷ molar mass
Number of Moles
n = M × V
molarity × volume
Understanding Molarity
What is Molarity?
Molarity (M) is a unit of concentration that measures the number of moles of solute dissolved per liter of solution. It's the most common way to express concentration in chemistry because it relates directly to the number of particles in solution.
Why Use Molarity?
- •Directly relates to particle count in solution
- •Essential for stoichiometric calculations
- •Used in reaction rate calculations
- •Standard unit for solution chemistry
Molarity vs Other Units
Molarity (M)
Moles of solute per liter of solution
Most common, temperature dependent
Molality (m)
Moles of solute per kg of solvent
Temperature independent
Mass Concentration
Mass of solute per volume of solution
Used in analytical chemistry