720. Aerosil particles (fine silica, SiO2, obtained by gas-phase hydrolysis of SiCl4 at high temperature) have a ζ-potential of -34.7 mV in an aqueous medium (pH 6.2). At what distance and to which electrode will the particles move in 30 minutes, if the voltage during electrophoresis is 110 V, the distance between the electrodes is 25 cm, the relative permittivity of the medium is 80.1, and the viscosity is 1.00 mPa-s.

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