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: ce2(so4)3, k2so4, kbr, nacl.

KBr > NaCl  > >  

Explanation:

Generally, the higher the lattice energy of the substance, the lower the solubility of the substance. The lattice energy of KBr is the lowest, follow by that NaCl and that of while that of   is the highest. Based on the relationship between the lattice energy and solubility, the solubility of the substances ranging from the highest to lowest is KBr > NaCl  > > .