If the adsorbed chloride ions occupy the inner Helmholtz layer of the electrical double layer, what is the field strength in V/m across the inner Helmholtz plane (IHP) when the potential drop across the entire double layer is 0.5 V? Assume that 90% of the potential drop is across the IHP. Also assume that the IHP is located at the center of the adsorbed Cl- ions. The radius of the Cl ion is 1.81 .