Problem: Which of the following compounds requires the most energy to convert one mole of the solid into separate ions?(a) K2S(b) K2O(c) CaS(d) Cs2S(e) CaO

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FREE Expert Solution

Lattice Energy = |cation charge×anion charge|cation radius + anion radius


K2S

Lattice energy = |+1×-2|4+3

Lattice energy = 0.2857


K2O

Lattice energy = |+1×-2|4+2

Lattice energy = 0.3333


CaS

Lattice energy = |+2×-2|4+3

Lattice energy = 0.5714


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Problem Details

Which of the following compounds requires the most energy to convert one mole of the solid into separate ions?
(a) K2S
(b) K2O
(c) CaS
(d) Cs2S
(e) CaO