Substances with high lattice energies tend to be less soluble than substances with low lattice energies.On that basis predict the relative aqueous solubility at 20°C,from highest to lowest,of the following ionic compounds: A)Fe₂(SO₄)₃ Li₂SO₄ KBr LiCl B)Fe₂(SO₄)₃ Li₂SO₄ LiCl KBr C)KBr LiCl Li₂SO₄ Fe₂(SO₄)₃ D)LiCl KBr Li₂SO₄ Fe₂(SO₄)₃

Question

Substances with high lattice energies tend to be less soluble than substances with low lattice energies.On that basis predict the relative aqueous solubility at 20°C,from highest to lowest,of the following ionic compounds: A)Fe₂(SO₄)₃ > Li₂SO₄ > KBr > LiCl B)Fe₂(SO₄)₃ > Li₂SO₄ > LiCl > KBr C)KBr > LiCl > Li₂SO₄> Fe₂(SO₄)₃ D)LiCl > KBr > Li₂SO₄> Fe₂(SO₄)₃

Quizplus · Accepted Answer

The ionic compound with the lowest lattice energy (i.e. the highest solubility) is KBr, followed by LiCl, Li₂SO₄, and Fe₂(SO₄)₃ in decreasing order of solubility based on their lattice energies. Therefore, the correct order of relative aqueous solubility from highest to lowest is KBr > LiCl > Li₂SO₄ > Fe₂(SO₄)₃, which is given by choice C.

Substances with High Lattice Energies Tend to Be Less Soluble