conductivity

The difference in conductivity between pure water and sulphuric acid is such a fact, mentioned by Clausius.

For the purpose of comparison the activity and the conductivity of molar hydrochloric acid are both represented by 100.

The conductivity of a solution, like that of a metal conductor, is the reciprocal of its resistance.

Thus, the current indicated by the ammeter is a closely approximate measure of the conductivity of the solution.

As a matter of experience, the conductivity of a given quantity of an acid or other ionogen does tend toward a limit.