Which has the shorter N - O length, NO2- or NO3-?

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Which has the shorter N - O length, NO2- or NO3-?

Expert Solution
Step 1

The Lewis structures of NO2- is :

Chemistry homework question answer, step 1, image 1

 

The Lewis structures of NO3- is :

Chemistry homework question answer, step 1, image 2

Step 2

The bond order of NO2- and NO3- can be calculated as :

Chemistry homework question answer, step 2, image 1

The higher the bond order, the stronger the bond and thus the shorter the bond.

Since the bond order of NO2- is greater than NO3-, so NO2- will have stronger bond. Therefore, bond length will be : NO2- < NO3-

 

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