Question

The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic interaction between the ions and thus the strength of the lattice energy of the ionic compound. Arrange the compounds according to the magnitudes of the lattice energies based on the relative ion charges and sizes.

Answer 1

Answer:

Lattice energy is the amount of energy that is released when two gaseous ions having opposite charges come nearer to form a chemical bond. If the sign of lattice energy is negative, the formed bond will be stable.

Answer and Explanation:

Considering the Born-Lande equation:

E

=

−

N

A

M

z

+

z

−

e

2

4

π

ε

∘

r

∘

(

1

−

1

n

)

Where,

E is the lattice energy.

N

A

is the Avogadro's number.

M is Madelung constant.

z

+

a

n

d

z

−

are positive and negative charges.

ε

∘

Permittivity

r

∘

is the distance between the closest ions.