72. Solving a chemistry problem

10. Determine the ξ-potential of the corundum membrane from the results of electroosmosis of KCl solutions.
С KCl, mol/l 0.01 0.02 0.1 0.5
Kv, Sm*m-1 0.128 0.250 1.167 5.55
R, Ohm 565 520 340 71.6
I*103, A 10 26 30 50
v*103, ml/s 0.780 0.628 0.730 0.185
R is the resistance of the membrane filled with the corresponding KCl solution.
Relative permittivity of solutions 80.1, viscosity 1*10-3 Pa*s, temperature 293 K.
For all solutions, calculate the thickness of the diffuse ionic layer λ and compare the nature of the change in the ζ-potential and λ with an increase in the concentration of the ζ-potential