expected. This can be attributed to the void volume and dielectric saturation. The addition of a sphere to water increases the volume due to the inefficient packing of the
water molecules around the ion. Since the water molecules firmly attached to an ion
are not mobile, the dielectric constant is lower near the ion and is much smaller than
the value in the bulk solution (increasing a). As with the solution properties, the addition of 0.085 to the radius improves the fit and gives a slope nearer to the continuum
value. If one assumes that the water molecules in the electrostricted region are not