9.12 Check the applicability of Smoluchowski’s theory for the coagulation of selenium sol with a solution of potassium chloride, determining the time of half coagulation value θ from the following data:
Coagulation time τ, s 0 65 288 595 908 1190
Total number of particles in 1 m 3, n⋅10-15− 3.22 2.52 1.33 0.98 0.67 0.53

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