By using Pauling method calculate the ionic radii of k+ and cl- ions in the potassium chloride crystal. Dk+cl-=3.14
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According to pauling method,
radius of cation + radius of anion = distance between cation and anion = 3.14 A
equation 1
=
Effective nuclear charge of K = 19 - 9 x 1 = 10
Effective nuclear charge of Cl- = 17 - 9 x 1
= 8
=
equation 2
On solving the two equations
Radius of Cl⁻ =
= 1.74 A
Radius of K⁺ = 3.14 - 1.74 = 1.4 A
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