Determination of kinematic diffusion coefficient

To determine the kinematic diffusion coefficient of sodium chloride at several concentrations and to compare with the calculated value at infinite dilution. 

We define the Pick s law coefficient Dpick and the kinematic diffusion coefficient D by 

The activity coefficient of sodium chloride has been determined from 

The molar conductance A of NaCl and the transport numbers t, all at infinite dilution, are as follows (Macinnes, Principles of dectrodiemistry . Reinhold, 1939) 

The Fick s law coefficient is related to the kinematic diffusion coefficient by 

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