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concentration

A Dictionary of Biology | 2004 | Â© A Dictionary of Biology 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

concentration The quantity of dissolved substance per unit quantity of solvent in a solution. Concentration is measured in various ways. The amount of substance dissolved per unit volume (symbol c) has units of mol dm^–3 or mol l^–1. It is now called `concentration' (formerly molarity). The mass concentration (symbol ρ) is the mass of solute per unit volume of solvent. It has units of kg dm^–3, g cm^–3, etc. The molal concentration (or molality; symbol m) is the amount of substance per unit mass of solvent, commonly given in units of mol kg^–1.

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