142. Solving a chemistry problem

9.13. Calculate the mass of the precipitate obtained on the electrode during electrophoresis of an aqueous suspension of corundum at an electric field strength of 1 * 10 ^ 2; 2 * 10 ^ 2; 4 * 10 ^ 2 V / m; suspension concentration c = 2 * 10 ^ 3
  kg / m3; deposition time t = 10 s; e is 81; n = 1 * 10-3 Pa * s; e´-potential, determined by the speed of electroosmosis without taking into account surface conductivity, is 49.6 * 10-3 V; the diaphragm efficiency coefficient is 1.8; surface of a flat electrode S = 1 * 10–4 m2.