51. Solving a chemistry problem
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81. The half coagulation time θ of gold sol in water under the action of sodium chloride is 20 s. Determine the time it takes for the concentration of the sol to decrease by 10 times. Calculate the coagulation rate constant using the formula K=4RT/(3ηNA); η = 10-3 Pa⋅s; T = 300 K.
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