Question

Order the following ionic compounds in order of increasing magnitude of lattice energy: MgO, CaCl2, KCl, and LiF Group of answer choices MgO < CaCl2 < KCl < LiF KCl < CaCl2 < LiF < MgO LiF < KCl < CaCl2 < MgO KCl < LiF < CaCl2 < MgO KCl < LiF < MgO < CaCl2

Answer 1

KCl < CaCl2 < LiF < MgO

Step-by-step explanation:

The magnitude of lattice energy depends on the relative sizes of ions in the ionic compound. The smaller the size of the cation and anion, the greater the lattice energy of the ionic compound. Magnesium oxide contains a small cation and a small anion hence it possesses the greatest lattice energy.

The order of increasing lattice energy follows the order shown in the answer.