702. Suppose the dispersion medium of the suspension is a solution of lithium perchlorate LiClO4 0.1 mmol/dm3 in formamide at 25 °C (εg = 109.5). Calculate the thickness of the ionic atmosphere ϰ-1 in this medium. What equation should be used to calculate the ζ potential from the results of electrophoresis if the particle radius was 6 nm?

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