Molality Calculator

Calculate Solution Molality with Precision

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Basic Molality Calculator

Calculate the molality of a solution using mass of solute and mass of solvent.

Molality: - m

Solute Mass Calculator

Calculate the mass of solute needed for a specific molality.

Mass needed: - g

Understanding Molality

What is Molality?

Molality (m) is the number of moles of solute per kilogram of solvent. The formula is:

Molality (m) = moles of solute / kilograms of solvent

Advantages of Molality

Molality has several advantages over molarity:

  • Independent of temperature
  • Only depends on mass, not volume
  • Useful for colligative properties
  • More accurate for concentrated solutions

Applications

Molality is particularly useful in:

  • Freezing point depression calculations
  • Boiling point elevation studies
  • Osmotic pressure calculations
  • High-temperature reactions

Relationship with Density

Unlike molarity, molality doesn't require knowledge of solution density or volume, making it more convenient for many calculations.