3. the uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na". assume the water viscosity is 0.9482 mpas a) what is the diffusion coefficient of the micelle in water at 25 °c? b) what is the diffusion coefficient of the micelle in water containing 0.1 m nacl at 25 °c? assume the micelle concentration is relatively very very low hint: for this problem, see section 6.1.3 and table 6.1-1 of the cussler handout on diffusion of electrolytes found on canvas. use the stokes-einstein equation to determine the diffusion coefficient of an isolated micelle (i. e. for di). the stokes-einstein equation can be found in the week 2 cussler handout on canvas.
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