Theoretical Values of Diffusion Coefficients of Electrolytes in Aqueous Solutions: Important Parameters with Application in Fundamental and Technological Areas

Mutual diffusion coefficients of different electrolytes, in aqueous solutions, at 298.15 K, have been estimated by using Onsager–Fuoss and Pikal theories for over 300 electrolytes. These theories are described and discussed. The limitations of these theories are dependent on different types of electrolytes, that is, symmetrical univalent (1:1), symmetrical polyvalent (basically 2:2), and nonsymmetrical polyvalent. We believe that the compiled diffusion coefficients are of utmost importance for fundamental and practical applications.