4 Potential Wells and Equilibrium Bond Distances The textbook describes the energy potential of ionic attraction as: E(r)=rA+rnB Meanwhile, a popular description for the potential associated with van der Waals bonding is the Lennard-Jones potential: E(r)=4E0[(r)12(r)6] Here, E0 measures the depth of the potential well and is the radius where E(r)=0. (a) Derive an expression for the equilibrium bond distance of an ionic bond. (b) Derive an expression for the equilibrium bond distance of a secondary van der Waals bond. (c) Would you expect the well depth at the respective equilibrium bond distances to be deeper for the ionic or the van der Waals potential? Why