Molality (molal concentration) (m = n_solute / mass_solvent (kg))

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m = n_solute / mass_solvent (kg)

What each symbol means

SymbolWhat it stands for
mMolality (mol kg⁻¹)
n_soluteMoles of solute
w_solventMass of solvent only (kg)

When to use this

Ideal for colligative properties; independent of temperature to first order (mass-based).