625. Determine the CMC of dodecylammonium chloride С₁₂Н₂₅NH₃Cl (molecular weight 221.80 g/mol) in a solution of 0.01 mol/l at 30°С according to the following turbidity data:

C, g/L 0 0.75 1.21 1.90 2.18 2.75 3.20 4.10 5.10 6.10 7.35
*10³, m¯¹ 4.90 5.14 5.09 5.47 5.38 5.95 12.0 21.13 29.04 34.84 40.41

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