The net potential energy between two adjacent ions, EN, may be represented by Where A, B, and n are constants whose values depend on the particular ionic system. Calculate the bonding energy E0 in terms of the parameters A, B, and n using the following procedure:
a. Differentiate EN with respect to r, and then set the resulting expression equal to zero, since the curve of EN versus r is a minimum at Eo.
b. Solve for r in terms of A, B, and n, which yields r0, the equilibrium interionic spacing.
c. Determine the expression for E0 by substitution of r0 into the above equation for EN.