619. Determine the molar mass and aggregation number of micelles of tetradecyltrimethyl ammonium chloride C14H29N(CH3)3Cl (mol. mass 291.93) in water at 23 °C according to the following turbidity data:
s, g/l 1.94 3.34 4.31 5.13 6.16
τ*103, m-1 9.54 14.9 17.8 19.2 20.8

It is known that CMC is 1.20 g/l, the turbidity of the solution is 5.33*10-3 m-1 at CMC. Other data: light wavelength 436 nm, light refractive index in solvent 1.3328, refractive index increment Δn/Δс = 0.157 cm3/g.

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