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Question 1 (18pts total) Gemini or dimeric surfactants are a class of amphiphiles where each molecule has 2 alkyl tails and 2 hydrophilic headgroups, attached
Question 1 (18pts total) "Gemini" or dimeric surfactants are a class of amphiphiles where each molecule has 2 alkyl tails and 2 hydrophilic headgroups, attached by a "linker" group. The linker may bind the headgroups together, or in some cases, the alkyl tails together. They readily form micelles with low CMC (critical micelle concentrations) with relatively small aggregation number N - the number of amphiphile molecules per micelle. We will examine the micelle formation of the cationic amphiphile shown that has a diamide linker between the 2 headgroups. At 298K, the CMC=8.6105M with 20 amphiphile molecules per micelle (N=20). 1a. (6pts) Write down the balanced chemical equation for the equilibrium between the amphiphile molecules in aqueous solution and the micelles (each composed of 20 amphiphile molecules) As we talked about in lectures (Module 1.3), there is a simple relationship between the critical micelle concentration (CMC), the equilibrium constant for the formation of micelles (K) and the aggregation number (N) for the micelles: CMC=(NK1)1/N Eqn. 1 Use the experimental value given for the CMC to determine the value of the equilibrium constant K for micelle formation at 298K
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