8. Solving a chemistry problem

4. Calculate the value of the ξ-potential at the boundary of the ceramic membrane with an aqueous solution of KCl. The solution is pressed through the membrane at р=39.9*10-3 N/m2. Flow potential E=6*10-3 V, electrical conductivity of the medium x=1.3*10-2 Ohm-1*m-1, viscosity n=103 N*sec/m2, dielectric constant e=81, electrical constant e0 \u003d 8.85 * 10-12 F / m.