ER = 9 1. For a K-Clion pair, attractive and repulsive energies EA and Er, respectively, depend on the distance between the ions r, according to -13.6 EA = r 5.86 x 10-6 r9 For these expressions, energies are expressed in electron volts per K - Cl pair, and r is the distance in nanometers. The net energy En is just the sum of the preceding two expressions. (a) Superimpose on a single plot Ea, Er and En versus r up to 1.0 nm. (b) Based on this plot, determine (i) the equilibrium spacing between K - Clions, and (ii) the magnitude of the bonding energy E, between the ions. (c) Also calculate the ro and Eo mathematically and compare your results with the graphical results from part (b) 15 + 5 + 10 = 20 points , =