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Calculate the boundary layer thickness at the surface of an ion-exchange membrane in an electrodialysis process in the diluate cell in which the limiting current density has been determined to be 10 mA cm?, the transport number of the counter-ion in the membrane is 0.98, and in the solution 0.42. The bulk solution concentration in the diluate cell is 0.018 mol (ions) L'. The diffusion coefficient of the solute is 1.2.10-cm's