131.Solving a chemistry problem

19. Determine the value of the ξ-potential at the boundary of the ceramic filter and - the aqueous solution of KCl, if, when pushing the solution
(P = 13.3⋅10 3 Pa), the flow potential Ε flows = 2.6 · 10 -3 V, and the specific electric conductivity of the medium is ω = 1.6⋅10 -2 Ω -1 ⋅ m -1; viscosity of the medium η = 10 -3 Pa · s; ε 0 = 8.85⋅10 -12 F / m; ε = 81.