4. Calculate the electrokinetic potential at the interface between the phases of quartz and an aqueous solution of KCl using the following electroosmosis data:
current strength 2 * 10-3A, transfer time of 0.1 ml of solution - 110 s, specific conductivity of the solution 6.2 * 10-2 Sm * m-1, viscosity 10-3 Pa * s, relative dielectric constant 80.1

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