Before revision: It is difficult to model precisely the interaction that any particular polyelectrolye solution will exhibit because the steric forces are dependent upon the combination of the chemical makeup of both the polymer and the solvent as well as any ionic species present in the solution.
After revision: It is difficult to model precisely the interaction that any particular polyelectrolyte solution will exhibit because the steric forces are dependent upon the combination of the chemical makeup of both the polymer and the solvent as well as any ionic species present in the solution.