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

  1. Calculate required mass of solute
  2. Weigh solute accurately
  3. Add solute to volumetric flask
  4. Add solvent to calibration mark
  5. 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