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Question

What role does lattice energy play in the stability of ionic compounds?


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Solution

Lattice energy:

  • Ionic compounds are made up of oppositely charged ions and are held together by electrostatic forces of attraction.
  • Lattice energy gives measures the stability of ionic solids and is the amount of energy required to break an ionic lattice into its constituent ions.
  • The greater the value of the lattice energy, the more stable will be the ionic compound.
  • For example, the lattice energy of Calcium chloride CaCl2 is greater than Potassium chloride KCl, which means that the ionic compound CaCl2 is more stable than KCl.

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