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21 Specific surface of spherical particles of silica hydrosol is: a) 1,1 • 104 m2 / kg; b) 1,1 • 105 m2 / kg; c) 1,1 • 106 m2 / kg. The density of silica is ρ = 2.7 g / cm3; viscosity of the dispersion medium η = 10-3 Pa · s; temperature T = 293 K. Determine the projections of the mean shift of the sol particles for τ = 12 s.
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Questions and problems from the manual:
"Laboratory Workshop on Colloid Chemistry" Nekrasov AP, Veretenchenko BA, Kharkov NTU "KhPI", 2004
"Characteristic properties of disperse systems" Nekrasov AP, Kharkov, 1996
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