Bond Angles Video Lessons

Concept: VSEPR Model for Bonding

# Problem: Predict the actual bond angle(s) in nitrite (best estimate):A. 180° exactly      B. &lt; 90°      C. &lt; 109.5°      D. &lt; 120°E. &lt; 180°

###### FREE Expert Solution

We are asked to predict the actual bond angle(s) in nitrite (NO2-)Since we don’t know the Lewis structure for NO2-, we need to do the following steps:

Step 1: Determine the central atom in this molecule.

Step 2: Calculate the total number of valence electrons present.

Step 3: Draw the Lewis structure for the molecule.

Step 4: Determine the number of electron groups around the indicated atom.

Step 5: Determine the electron geometry and bond angle using this:

Electron Regions          Electronic Geometry          Bond Angles

2                                      linear                                    180˚

3                                      trigonal planar                      120˚

4                                      tetrahedral                            109.5˚

5                                      trigonal bipyramidal              90˚, 120˚, and 180˚

6                                      octahedral                            90˚ and 180˚

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###### Problem Details

Predict the actual bond angle(s) in nitrite (best estimate):

A. 180° exactly      B. < 90°      C. < 109.5°      D. < 120°
E. < 180°