"Equivalent Concentration" is the amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of
another substance in a given chemical reaction, per volume.
Applicable units are those of quantitykind:Concentration
https://en.wikipedia.org/wiki/Equivalent_(chemistry)
The amount of a substance that reacts with (or is equivalent to) an arbitrary amount (typically one mole) of another substance in a given chemical reaction, per volume.