molality
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In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution.
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Encyclopedic overview
20 sectionsContents
- Definition
- Origin
- Unit
- Usage considerations
- Advantages
- Problem areas
- Relation to other compositional quantities
- Mass fraction
- Mole fraction
- Molar concentration (molarity)
- Mass concentration
- Equal ratios
- Example of conversion
- Osmolality
- Relation to apparent (molar) properties
- Relation to apparent molar properties and activity coefficients
- Molalities of a ternary or multicomponent solution
- From the molalities of the binary solutions
- See also
- References
In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution.
A commonly used unit for molality is moles of solute per kilogram solvent (mol/kg). A solution of concentration 1 mol/kg is often written as 1 molal (or 1 m).
Excerpted from Wikipedia’s “molality” article, available under the CC BY-SA 4.0 licence.