621. Determine the molar mass and aggregation number of micelles of tetradecyl trimethyl ammonium chloride C14H29N(CH3)3Cl (the number of surfactant molecules in one micelle) in aqueous solutions of 0.02 mol/l NaCl at 23 °C using the following turbidity data:
C, g/L 1.05 1.66 2.2 2.82 3.44 4.07 4.98 5.65
τ*103, m-1 10.1 17.0 22.7 28.3 32.6 37.2 42.7 45.2
It is known that the CMC is 0.70 g/l, the turbidity of the solution at CMC is 5.24*10-3 m-1. Other data: light wavelength 436 nm, light refractive index in solvent 1.333, refractive index increment Δn/Δс = 0.157 cm3/g.

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