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

72.
Coagulation time t, sec. 0 11.0 14.0 26.2 43.0
Total number of dispersed phase particles, VS·10-14 particles/m3 29.7 20.9 19.1 14.4 10.7

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