Molality Calculator

Find molality from moles of solute and mass of solvent.

Molality (mol/kg (m)) 0.25

Formula: molality = moles ÷ kg of solvent

Step-by-step with your numbers:

1. Values used:

2. Moles of solute = 0.5 mol

3. Mass of solvent = 2

5. Molality = Moles of solute / Mass of solvent = 0.5 / 2 = 0.25mol/kg (m)

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Molality is moles of solute per kilogram of solvent (temperature-independent).

The math behind it

molality = moles of solute ÷ kg of solvent.

0.5 mol in 2 kg → 0.25 m.

Vs molarity?

Molarity uses litres of solution; molality uses kg of solvent.