46. Solving a chemistry problem

357. Determine at what current strength in the process of electroosmotic movement of an aqueous solution of KCl through a membrane of polystyrene its volumetric velocity will be equal to 5.5·10 ^-10 m^3 / s. The specific electrical conductivity of the medium is 9•10^-2 Sm•m^-1, the viscosity of the medium is 1•10^-3 Pa•s, the relative permittivity of the medium is 80.1. The value of the electrokinetic potential is 10 mV.