Petr Vanýsek
This table gives the molar (equivalent) electrical conductivity Λ at 25 °C for some common electrolytes in aqueous solution at concentrations up to 0.1 M (0.1 mol L-1).
For very dilute solutions, the molar electrical conductivity for any electrolyte of concentration c can be approximately calculated using the Debye–Hückel–Onsager equation, which can be written for a symmetrical (equal charge on cation and anion) electrolyte as
Λ = Λ° – (A + BΛ°)c1/2
For a solution at 25 °C and both cation and anion with charge |1|, the constants are A = 60.20 and B = 0.229. Λ° can be found from the “inf. dil.” column in the table below or calculated from the ion values in the more extensive table “Ionic Conductivity and Diffusion at Infinite Dilution” in this section. The equation is reliable for c <0.001 mol/L; with higher concentration, the error increases.
Column definitions for the table are as follows.
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