3. Rabinovich and Fodiman, while studying the effect of electrolytes on the coagulation of colloids, determined the zeta potential for arsenic sulfide sol by macroelectrophoresis. In the device, the distance between the electrodes was 95 cm, and the voltage was 200 V. The viscosity of water at 298 K is 0.897 cps. Observation data are given below:
time, from 355 1015 2020
border displacement, mm 5 15 30
Calculate the average value of the potential. Additional information can be found in the handbook.
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