Question

Which of the following ionic solids would have the largest lattice energy? A. sodium fluoride B....

Which of the following ionic solids would have the largest lattice energy?
A. sodium fluoride
B. strontium oxide
C. cesium iodide
D. barium sulphate
E. calcium fluoride
Science   Chemistry   
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Answer #1

answer : B. strontium oxide

explanation:

NaF , SrO , CsI , BaSO4 , CaF2

lattice energy is directly proportional to the charges of the ions and inversly proportional to the radius of atoms

NaF -------> Na+ + F-

SrO ----------> Sr+2 + O-2

CsI ----------> Cs+ + I-

BaSO4 -----------> Ba+2 + SO4-2

CaF2 ----------> Ca+2 + 2F-

among the given BaSO4 and SrO have higher charges. so they should be higher lattice energy . now we have to decide which one is higher.

SrO is higher because Sr size is smaller than Ba . so ultimate answer is SrO

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