7.11. Calculate the volumetric charge density at the boundary of the diffusion layer ρδ of the dispersed phase using the following data: ϕδ = 0.03 V, the environment is an aqueous solution of KCl with a concentration of 3∙10–4 mol/l, the relative dielectric constant of the medium is 80.1, temperature 293 K What is the density of the surface charge due to the diffuse layer?

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