Predict the relationship between the lattice energies (U) of KBr and CaO. A)U_CaO 4 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is smaller. B)U_CaO 2 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is smaller. D)U_CaO

Question

Predict the relationship between the lattice energies (U) of KBr and CaO. A)U_CaO > 4 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is smaller. B)U_CaO < 4 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is larger.. C)U_CaO > 2 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is smaller. D)U_CaO < 4 U_KBr because the ionic charges are +2 and -2 and the distance between the ions is larger. E)U_CaO and U_KBrare about the same because the larger ionic charge is compensated by the larger distance between the ions.

Quizplus · Accepted Answer

The lattice energy of CaO is greater than that of KBr because CaO has ions with higher charges (+2 and -2) compared to KBr (+1 and -1), and the distance between ions in CaO is smaller, leading to stronger electrostatic attraction.

Predict the Relationship Between the Lattice Energies (U) of KBr