A synthetic polyanion (a fully ionised polyacrylate chain) in water at carries one…

PHYSICS · Multi-part · Fermi University Physics · Biophysics & Medical Physics · Macromolecules, membranes and cell architecture · Macromolecules, membranes and cell architecture

Forces, Machines and Signals, Ch Charges in salt water and the assembly of amphiphiles

Problem

A synthetic polyanion (a fully ionised polyacrylate chain) in water at

298\,\mathrm{K}

carries one negative charge every

b = 0.25\,\mathrm{nm}

along its backbone. ((a)) Compute the Manning parameter

\xi_M = \ell_B/b

and state whether the chain condenses monovalent counterions. ((b)) If it does, find the fraction of its bare charge neutralised by condensation.

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