Question

The table lists the lattice energies of some compounds. Compound Lattice Energy (kJ/mol) LiF –1,036 LiCl –853 NaF –923 KF –821 NaCl –786 Which statement about crystal lattice energy is best supported by the information in the table? The lattice energy increases as cations get smaller, as shown by LiF and KF. The lattice energy increases as the charge of anions increases, as shown by LiF and LiCl. The lattice energy decreases as anions get smaller, as shown by NaCl and NaF. The lattice energy decreases as the charge of cations decreases, as shown by NaF and KF.

Answer 1

The best and the most correct answer among the choices provided by the question is the first choice. The statement the supports the information is "The lattice energy increases as cations get smaller, as shown by LiF and KF." I hope my answer has come to your help. God bless and have a nice day ahead!

Answer 2

Answer : Option A) The lattice energy increases as cations get smaller, as shown by LiF and KF.

Explanation : It is observed that lattice energy is mostly influenced by two main factors of an ionic solid which are;

i) The charge on the ions - As the charge of the ions increases, the lattice energy is observed to increase too.

and

ii) The radius, or size, of the ions - As the size of the ions increases, the lattice energy decreases with it.

So, here in this question the second reason is clearly observed. Hence, it is self-explained that the size of the cations are decreased in the ionic solids the lattice energy increases.