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118. Solving a chemistry problem
Content: 2.rar 20,69 kB
Product description
Determine the molar mass and aggregation number of micelles of sodium deoxycholate (one of the components of bile salts responsible for digestion of food, molecular weight 414.6 g/mol) using the data of equilibrium centrifugation. The data include: temperature 200C, solvent density (0.3 mol/l NaCl) 1.0104 g/cm3, specific partial volume of micelles 0.76 cm3/g, angular velocity 1318 s-1. The design of the centrifuge made it possible to measure the concentration gradient dc/dx and the concentration at a certain distance x from the rotation axis. At x=6.8712 cm c=0.07845 g/dl and dc/dx=0.1080 (g/dl)/cm were determined. (Note that the concentration unit is irrelevant for the solution).
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