615. Determine the molar mass and aggregation number of micelles of dodecyl ammonium chloride C12H25NH33Cl (the number of surfactant molecules in one micelle) in aqueous solutions of 0.15 mol/l at 30 C according to the following turbidity data:
s, g/l 3.30 4.80 5.92 7.8 9.16 10.00
τ*103, m-1 353 558 700 919 1076 1176
It is known that CMC is 1.01 g/l, the turbidity of the solution is 5.57*10-3 m-1 at CMC. Other data: light wavelength 436 nm, light refractive index in solvent 1.3336, refractive index increment Δn/Δс = 0.160 cm3/g.

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