2a. SDS forms spherical micelles with an aggregation number N~ 57 amphiphiles. The radius of the micelle is about 20A. The headgroups of SDS are highly charged, and a sulfate anion headgroup has an approximate net charge of -1.9 x10-¹9C (Coulombs). The headgroups are about 0.9 nm apart on the surface of the micelle.

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2a. SDS forms spherical micelles with an aggregation number N~57 amphiphiles. The radius of the
micelle is about 20A. The headgroups of SDS are highly charged, and a sulfate anion headgroup has an
approximate net charge of -1.9 x10-¹⁹C (Coulombs). The headgroups are about 0.9 nm apart on the
surface of the micelle.
Use Coulomb's Law to estimate the electrostatic energy (Welcc) between one sulfate headgroup and 4
neighboring headgroups in pure water at 25°C. Express your answer in units of "T".
Transcribed Image Text:2a. SDS forms spherical micelles with an aggregation number N~57 amphiphiles. The radius of the micelle is about 20A. The headgroups of SDS are highly charged, and a sulfate anion headgroup has an approximate net charge of -1.9 x10-¹⁹C (Coulombs). The headgroups are about 0.9 nm apart on the surface of the micelle. Use Coulomb's Law to estimate the electrostatic energy (Welcc) between one sulfate headgroup and 4 neighboring headgroups in pure water at 25°C. Express your answer in units of "T".
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