Arrange NaCl, KBr and BeO in increasing lattice energy. Then do the same for BaO,CaO and...

Question

Question

Arrange NaCl, KBr and BeO in increasing lattice energy. Then do the same for BaO,CaO and KI separately.

Answer 1

Answer #1

Lattice energy depends up on

a) the charge of the ions increases, the lattice energy increases
b) size of the ions increases, the lattice energy decreases

Case I) NaCl, KBr, BeO

BeO has the smallest cation and anion. Hence maximum lattice energy.

After BeO, NaCl has intermediate lattice energy followed by KBr.

BeO > NaCl > KBr

Case II) Due to high charge on BaO and CaO, they have high lattice energy than KI.

In between CaO and BaO, CaO has high lattice energy due to small size.

CaO> BaO> KI

Answer 2

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