Molar ion conductivities

The temperature dependence of conductivity (see Sect. 2.5) depends on temperature in the same way as the diffusion coefficient of ions. Often it is convenient to estimate actual values of D by means of its relation to conductivity. Two fundamental equations describe this relation. It is Eq. (2.19), the Einstein relation (with u the molar ion mobility and F the Faraday constant), and Eq. (2.20), the Nemst-Einstein relation (with 2 the molar ion conductivity). 

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