70. Calculate the half-coagulation time and the coagulation rate constant using the experimental data obtained using an ultramicroscope on the change in the total number of particles during the coagulation of a lyophobic dispersed system under the action of an electrolyte.
Note: It is expedient to represent the Smoluchowski equation in the form:
VO /VS = f(t) after which the half-coagulation time is determined graphically.

70.
Coagulation time t, sec. 0 125 250 375 425
Total number of particles of the dispersed phase, VS 10-14 particles/m3 20.2 8.08 5.05 3.67 3.31

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