Lattice energy of NaCl is `X'. If ionic size of A2+ is equal to Na+ and B2– is equal to Cl–, then lattice energy of AB is
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Answer:
The lattice energy of crystal AB is 4X.
Explanation:
Lattice energy is the energy associated to the crystal lattice of a compound.
Mathematically,
where, k = proportionality constant
are the charges on the ions in coulombs
d = distance between the ion charges.
Lattice energy of NaCl = X
As the ionic size remains same when AB crystal is formed, d remains same
Lattice energy of AB,
The lattice energy of crystal AB is 4X.
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