The reason for the formula of NaF to not be NaF 2 has to be determined. Concept Introduction: Lattice energy is used to determine the bond strength in ionic compounds. It is the heat of formation for ions of opposite charge in the gaseous phase combine to form an ionic solid. Lattice energy is the energy required to separate a mole of an ionic solid into gaseous ions. It cannot be measured empirically but it can be estimated by the Born-Haber cycle. MX ( s ) → M + ( g ) + X − ( g ) The two main factors responsible for the magnitude of the lattice energy are the charge and radius of the bonded ions. The effect of those factors is as follows: 1. If the charge of the ions increases, the lattice energy increases. 2. If the size of the ions increases, the lattice energy decreases.

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Chapter 9, Problem 9.7QE

Interpretation Introduction

Interpretation:

The reason for the formula of NaF to not be NaF2 has to be determined.

Concept Introduction:

Lattice energy is used to determine the bond strength in ionic compounds. It is the heat of formation for ions of opposite charge in the gaseous phase combine to form an ionic solid.

Lattice energy is the energy required to separate a mole of an ionic solid into gaseous ions. It cannot be measured empirically but it can be estimated by the Born-Haber cycle.

MX(s)→M+(g)+X−(g)

The two main factors responsible for the magnitude of the lattice energy are the charge and radius of the bonded ions. The effect of those factors is as follows:

1. If the charge of the ions increases, the lattice energy increases.

2. If the size of the ions increases, the lattice energy decreases.

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