Chapter 8, Problem 82AE

Interpretation Introduction

Interpretation:

The potential energy of a ${\text{Ca}}^{2+}$ and ${\text{O}}^{2-}$ is to be calculated and compared with the lattice energy of $\text{CaO}$ .

Concept introduction: The electrostatic potential energy is defined as the potential energy of two charged particles separated by a distance between them. The two charges have electrostatic interaction between them.
The electrostatic potential energy is calculated by the formula,

$$$E=k\frac{q_1{q}_2}{r}$

Lattice energy is defined as the potential energy needed for cleaving the bonds between ionic compounds. Its component atoms are converted to gaseous ions in this process.

To determine: The potential energy of a ${\text{Ca}}^{2+}$ and ${\text{O}}^{2-}$ and comparison of the potential energy value with lattice energy of $\text{CaO}$ .