20. Calculate the value of the energy of electrostatic repulsion Ue of two plane-parallel plates in an aqueous solution of KI at distances between surfaces of 5, 10 20, 30 and 50 nm and construct the dependence Ue = f(h) Take: ϕδ = 30 mV, c0 = 1 mmol/l, T = 293 K, ε = 80.1.

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