CHEM:ATOM FOC 2E CL (TEXT)
CHEM:ATOM FOC 2E CL (TEXT)
2nd Edition
ISBN: 9780393284218
Author: Stacey Lowery Bretz, Natalie Foster, Thomas R. Gilbert, Rein V. Kirss
Publisher: WW Norton & Co
Question
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Chapter 5, Problem 5.136QA
Interpretation Introduction

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.

Expert Solution & Answer
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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:

 Bond order=12[bonding electrons-antibonding electrons]

Concept:

MO diagram for valence electrons of O22- ion is:

CHEM:ATOM FOC 2E CL (TEXT), Chapter 5, Problem 5.136QA , additional homework tip  1

Total valence electrons in O2-2 ion=2×valence electrons of O atom±charge

Total valence electrons in O2-2 ion=6+6+2=14

Bond order is calculated using the formula:

Bond order=12[bonding electrons-antibonding electrons]

Bond order=128-6=1

Lewis structure of O22- ion is:

CHEM:ATOM FOC 2E CL (TEXT), Chapter 5, Problem 5.136QA , additional homework tip  2

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:

CHEM:ATOM FOC 2E CL (TEXT), Chapter 5, Problem 5.136QA , additional homework tip  3

Total valence electrons in O2-1 ion=2×valence electrons of O atom±charge

T otal valence electrons in O2-1 ion=6+6+1=13

Bond order is calculated using the formula:

Bond order=12[bonding electrons-antibonding electrons]

Bond order=128-5=1.5

Lewis structure of O2- ion is:

CHEM:ATOM FOC 2E CL (TEXT), Chapter 5, Problem 5.136QA , additional homework tip  4

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

CHEM:ATOM FOC 2E CL (TEXT)

Ch. 5 - Prob. 5.11QACh. 5 - Prob. 5.12QACh. 5 - Prob. 5.13QACh. 5 - Prob. 5.14QACh. 5 - Prob. 5.15QACh. 5 - Prob. 5.16QACh. 5 - Prob. 5.17QACh. 5 - Prob. 5.18QACh. 5 - Prob. 5.19QACh. 5 - Prob. 5.20QACh. 5 - Prob. 5.21QACh. 5 - Prob. 5.22QACh. 5 - Prob. 5.23QACh. 5 - Prob. 5.24QACh. 5 - Prob. 5.25QACh. 5 - Prob. 5.26QACh. 5 - Prob. 5.27QACh. 5 - Prob. 5.28QACh. 5 - Prob. 5.29QACh. 5 - Prob. 5.30QACh. 5 - Prob. 5.31QACh. 5 - Prob. 5.32QACh. 5 - Prob. 5.33QACh. 5 - Prob. 5.34QACh. 5 - Prob. 5.35QACh. 5 - Prob. 5.36QACh. 5 - Prob. 5.37QACh. 5 - Prob. 5.38QACh. 5 - Prob. 5.39QACh. 5 - Prob. 5.40QACh. 5 - Prob. 5.41QACh. 5 - Prob. 5.42QACh. 5 - Prob. 5.43QACh. 5 - Prob. 5.44QACh. 5 - Prob. 5.45QACh. 5 - Prob. 5.46QACh. 5 - Prob. 5.47QACh. 5 - Prob. 5.48QACh. 5 - Prob. 5.49QACh. 5 - Prob. 5.50QACh. 5 - Prob. 5.51QACh. 5 - Prob. 5.52QACh. 5 - Prob. 5.53QACh. 5 - Prob. 5.54QACh. 5 - Prob. 5.55QACh. 5 - Prob. 5.56QACh. 5 - Prob. 5.57QACh. 5 - Prob. 5.58QACh. 5 - Prob. 5.59QACh. 5 - Prob. 5.60QACh. 5 - Prob. 5.61QACh. 5 - Prob. 5.62QACh. 5 - Prob. 5.63QACh. 5 - Prob. 5.64QACh. 5 - Prob. 5.65QACh. 5 - Prob. 5.66QACh. 5 - Prob. 5.67QACh. 5 - Prob. 5.68QACh. 5 - Prob. 5.69QACh. 5 - Prob. 5.70QACh. 5 - Prob. 5.71QACh. 5 - Prob. 5.72QACh. 5 - Prob. 5.73QACh. 5 - Prob. 5.74QACh. 5 - Prob. 5.75QACh. 5 - Prob. 5.76QACh. 5 - Prob. 5.77QACh. 5 - Prob. 5.78QACh. 5 - Prob. 5.79QACh. 5 - Prob. 5.80QACh. 5 - Prob. 5.81QACh. 5 - Prob. 5.82QACh. 5 - Prob. 5.83QACh. 5 - Prob. 5.84QACh. 5 - Prob. 5.85QACh. 5 - Prob. 5.86QACh. 5 - Prob. 5.87QACh. 5 - Prob. 5.88QACh. 5 - Prob. 5.89QACh. 5 - Prob. 5.90QACh. 5 - Prob. 5.91QACh. 5 - Prob. 5.92QACh. 5 - Prob. 5.93QACh. 5 - Prob. 5.94QACh. 5 - Prob. 5.95QACh. 5 - Prob. 5.96QACh. 5 - Prob. 5.97QACh. 5 - Prob. 5.98QACh. 5 - Prob. 5.99QACh. 5 - Prob. 5.100QACh. 5 - Prob. 5.101QACh. 5 - Prob. 5.102QACh. 5 - Prob. 5.103QACh. 5 - Prob. 5.104QACh. 5 - Prob. 5.105QACh. 5 - Prob. 5.106QACh. 5 - Prob. 5.107QACh. 5 - Prob. 5.108QACh. 5 - Prob. 5.109QACh. 5 - Prob. 5.110QACh. 5 - Prob. 5.111QACh. 5 - Prob. 5.112QACh. 5 - Prob. 5.113QACh. 5 - Prob. 5.114QACh. 5 - Prob. 5.115QACh. 5 - Prob. 5.116QACh. 5 - Prob. 5.117QACh. 5 - Prob. 5.118QACh. 5 - Prob. 5.119QACh. 5 - Prob. 5.120QACh. 5 - Prob. 5.121QACh. 5 - Prob. 5.122QACh. 5 - Prob. 5.123QACh. 5 - Prob. 5.124QACh. 5 - Prob. 5.125QACh. 5 - Prob. 5.126QACh. 5 - Prob. 5.127QACh. 5 - Prob. 5.128QACh. 5 - Prob. 5.129QACh. 5 - Prob. 5.130QACh. 5 - Prob. 5.131QACh. 5 - Prob. 5.132QACh. 5 - Prob. 5.133QACh. 5 - Prob. 5.134QACh. 5 - Prob. 5.135QACh. 5 - Prob. 5.136QACh. 5 - Prob. 5.137QACh. 5 - Prob. 5.138QACh. 5 - Prob. 5.139QACh. 5 - Prob. 5.140QA
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