721. Let us assume that the dispersion medium of the suspension is a solution of sodium iodide NaI 0.01 mol/dm3 in formamide at 25 °C (εg = 33.2). Calculate the thickness of the ionic atmosphere ϰ-1 in this environment and name what equation should be used to calculate the ζ-potential from the electrophoresis results if the particle radius is 50 nm?

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