Conductivity of electricity, image 1 in a series of 3. Conductivity is traditionally determined by measuring the AC resistance of the solution between two electrodes. Dilute solutions follow Kohlrausch's Laws of concentration dependence and additivity of ionic contributions. Lars Onsager gave a theoretical explanation of Kohlrausch's law by extending Debye-Hückel theory. The conductivity (or specific conductance) of an proton solution is a measure of its ability to conduct electricity.