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Ed
Ed asked in Science & MathematicsChemistry · 9 years ago

Why might there be some covalency in an ionic bond?

Please explain!

Update:

Is there evidence from the born-haber cycle that can be used to answer this? If so, what?

1 Answer

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  • pisgahchemist
    Lv 7
    9 years ago
    Favorite Answer

    Of course there is. The archtypical ionic bond is found in NaCl, yet it is about 70 percent ionic and 30 percent covalent. The percent ionic character in a bond can be determined from the following equation:

    Percent ionic char. = 100(1 - e^(-ΔEN²/4))

    The Born-Haber cycle treats the bond as if it is 100% ionic, yet there are few, if any, 100% ionic bonds.

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