Concentration Calculator - Molarity, Molality & Mass Percent
Free online concentration calculator for molarity, molality, and mass percent. Calculate chemical solution concentrations with step-by-step formulas and examples.
Enter Solution Details
Moles of solute per liter of solution
Concentration Types
- Molarity (M): mol solute / L solution
- Molality (m): mol solute / kg solvent
- Mass %: (mass solute / total mass) × 100
Concentration Result
Enter solution details to calculate concentration
About Concentration Calculator
The Concentration Calculator calculates different types of solution concentrations.
Concentration Types:
- Molarity (M): Moles of solute per liter of solution
- Molality (m): Moles of solute per kilogram of solvent
- Mass Percent (%): Mass of solute as percentage of total mass
Formulas:
- Molarity = moles solute / liters solution
- Molality = moles solute / kilograms solvent
- Mass % = (mass solute / total mass) × 100
When to Use Each:
- Molarity: Most common, temperature-dependent
- Molality: Temperature-independent, colligative properties
- Mass %: Simple composition, industrial applications
Applications:
- Solution preparation
- Chemical analysis
- Quality control
- Research and development
Note: Molarity calculations assume 1 L of solution. For precise work, measure actual solution volume.
Frequently Asked Questions
What is concentration in chemistry?
Concentration refers to the amount of solute dissolved in a given amount of solvent or solution. It's typically expressed as molarity (M), molality (m), or mass percent (%).
What's the difference between molarity and molality?
Molarity is moles of solute per liter of solution, while molality is moles of solute per kilogram of solvent. Molarity changes with temperature, but molality doesn't.
How do I calculate molarity?
Molarity = moles of solute ÷ liters of solution. First convert solute mass to moles using molar mass, then divide by the solution volume in liters.
What is mass percent concentration?
Mass percent is the mass of solute divided by the total mass of solution, multiplied by 100. It's commonly used in industrial applications.
Why is concentration important in chemistry?
Concentration affects reaction rates, equilibrium positions, colligative properties, and is crucial for preparing solutions with specific properties.