9. Calculate the average half-coagulation time θ for a highly dispersed kaolin suspension using the following data:
Coagulation time τ, s 0 105 180 255 335 420
Total number of particles in 1 m3, n⋅10 –14 5.0 3.9 3.18 2.98 2.52 2.0
Draw a conclusion about the applicability of Smoluchowski's theory to the process of kaolin coagulation.

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