Molarity Calculator
Calculate molarity, mass, volume, and moles for chemical solutions
Solution Parameters
Calculation Type
Compound Information
g/mol
Molarity Calculation
Common Solutions
Calculation Results
Result
0 M
Molarity
Solution Details
Compound:
–
Molar Mass:
0 g/mol
Moles of Solute:
0 mol
Mass of Solute:
0 g
Volume of Solution:
0 L
Molarity Formula
M = n / V
Molarity = moles ÷ volume (L)
• n = m / M_w
• m = n × M_w
• V = n / M
• C₁V₁ = C₂V₂ (Dilution)
Unit Conversions
1 M =
1000 mM
1 L =
1000 mL
1 g =
1000 mg
1 mol =
6.022×10²³ particles
Laboratory Tips
- • Always use volumetric flasks for precise volumes
- • Measure mass accurately using analytical balance
- • Add solute to solvent, not vice versa
- • Mix thoroughly until completely dissolved
Common Laboratory Solutions
| Compound | Formula | Molar Mass (g/mol) | Common Concentrations | Uses |
|---|---|---|---|---|
| Sodium Chloride | NaCl | 58.44 | 0.9% (0.15 M), 3% (0.51 M) | Saline solution, buffer |
| Hydrochloric Acid | HCl | 36.46 | 1M, 6M, 12M (concentrated) | pH adjustment, cleaning |
| Sodium Hydroxide | NaOH | 40.00 | 1M, 5M, 10M | Base, pH adjustment |
| Sulfuric Acid | H₂SO₄ | 98.08 | 1M, 18M (concentrated) | Strong acid, dehydration |
| Glucose | C₆H₁₂O₆ | 180.16 | 0.1M, 1M | Cell culture, biochemistry |
Understanding Molarity
What is Molarity?
Molarity (M) is the number of moles of solute per liter of solution. It’s the most common unit for expressing concentration in chemistry laboratories.
Preparation Steps
- Calculate required mass of solute
- Weigh solute accurately
- Add solute to volumetric flask
- Add solvent to calibration mark
- Mix thoroughly until dissolved
Dilution Formula
C₁V₁ = C₂V₂
Where C₁ and V₁ are the initial concentration and volume, and C₂ and V₂ are the final concentration and volume after dilution.
Safety Considerations
- Wear appropriate PPE (gloves, goggles, lab coat)
- Add acid to water, not water to acid
- Work in well-ventilated areas
- Label all solutions clearly