Under certain conditions, about 20 molecules, on average, are predicted to exist in each β-octylglucoside detergent micelle. If the critical micelle concentration for this detergent is about 20 mM under these conditions, at what total β-octylglucoside concentration are about half of the detergent molecules found in micelles?
A) 1 mM
B) 10 mM
C) 20 mM
D) 21 mM
E) 40 mM

Question

Quizplus · Accepted Answer

Concentration of the free detergent remains constant above the critical concentration of 20 mM. Thus, at 40 mM total concentration, half of the detergent molecules are free and the other half are in micelles.

Under Certain Conditions, About 20 Molecules, on Average, Are Predicted