51. Solving a chemistry problem

28. According to experimental data, the hydrosol half-coagulation time is 340 s at an initial partial particle concentration of 2.52 * 1014 parts / m3, a dispersion medium viscosity of 1 * 10-3 Pa * s, and a temperature of 293 K. Conclude whether fast or slow is coagulation, if the viscosity of the medium is increased by 3 times.