In the following we investigate in detail the long-range dipole-dipole interaction leading to the equivalent of the Debye-Hückel term in the classical theory of electrolyte solutions. We expect that the minimum hydration shell radius R h as defined in Equ. 9 defines a minimum dipole moment µ 0 = q eff R h inside the droplet. q eff will be determined by the composition of the electrolyte and is expected to be unity for 1:1 electrolytes.