active mass

active mass
noun
1. : the concentration of a reacting substance expressed usually in moles per liter
2. : the concentration of the portion of a dissolved electrolyte that is dissociated into ions and hence is capable of carrying the electric current

* * *

Chem.
the effective concentration of a substance.
[1905-10]

* * *

active mass,
the molecular concentration of the substances involved in a chemical reaction, expressed in mols (gram molecules) per liter.

Useful english dictionary. 2012.

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