For these expressions, energies are expressed in electron volts (ev) per na+–cl– pair, and r is the distance in nanometers (nm). the net energy en is just the sum of the preceding two expressions. (a) superimpose on a single plot en, er, and ea versus r up to 1.0 nm. (b) on the basis of this plot, determine graphically (i) the equilibrium spacing r0 between the na+ and cl– ions, and (ii) the magnitude of the bonding energy e0 between the two ions. (c) mathematically determine the r0 and e0 values using the expression for en (see problem 2.18 in the book), and compare these with the graphical results from part (b).
