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To determine:
The bond order of the peroxide and superoxide ions and determine if the bond order values are consistent with those predicted from the Lewis structures.
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Answer to Problem 5.136QA
Solution:
The bond order of peroxide (O22-) ion is 1 which is consistent with the Lewis structure.
The bond order of superoxide (O2-) ion is 1.5 which is not consistent with the Lewis structure.
Explanation of Solution
Formula:
Concept:
MO diagram for valence electrons of O22- ion is:
Bond order is calculated using the formula:
Lewis structure of O22- ion is:
Here, both O atoms are singly bonded. Therefore, the bond order is 1, which is consistent with the bond order of MO diagram.
MO diagram for valence electrons of O2- ion is:
T
Bond order is calculated using the formula:
Lewis structure of O2- ion is:
Here, both O atoms are singly bonded. Therefore, the bond order is 1, which is not consistent with the bond order of MO diagram.
Conclusion: The bond order of peroxide (O22-) ion is 1 which is consistent with the Lewis structure. The bond order of superoxide (O2-) ion is 1.5 which is not consistent with the Lewis structure.
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Chapter 5 Solutions
Chemistry: An Atoms-Focused Approach (Second Edition)
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