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117. Solving a chemistry problem
Uploaded:
10.08.2022
Content: 609.rar 52,59 kB
Content: 609.rar 52,59 kB
Product description
609. Determine the molar mass and aggregation number of micelles of dodecylammonium chloride C12H25NH3Cl (the number of surfactant molecules in one micelle) in dilute aqueous solutions at 30 ° C according to the following turbidity data:
s, g/l 5.61 6.80 8.00 9.07 9.27 10.27 11.88 14.28 16.48
τ*103, m-1 24.18 31.42 38.70 40.08 40.89 43.03 45.17 48.60 51.31
It is known that the CMC is 3.23 g/l, the turbidity of the solution at CMC is 5.37*10-3 m-1. Other data: light wavelength 436 nm, light refractive index in solvent 1.3320, refractive index increment Δn/Δс = 0.161 cm3/g.
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