Bond Angles Video Lessons

Concept: VSEPR Model for Bonding

# Problem: Are the O-N-O bond angles greater in the nitrile ion (NO2-) or the nitrate ion (NO3-)?Please select the answer the best explains your conclusion.a. Nitrite has the greater bond angle because a trigonal planar bond angle is greater than a tetrahedral bond angleb. Nitrite has the greater bond angle because a linear bond angle is greater than a trigonal planar bond anglec. Nitrate has the greater bond angle because nitrite’s lone pairs take up more space than bondsd. Nitrate has the greater bond angle because double bonds take up more space than single bonds

###### FREE Expert Solution

We’re being asked to identify which has greater O-N-O bond angles. Since we don’t know the Lewis structure for nitrile ion (NO2-) or the nitrate ion (NO3-), 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

Are the O-N-O bond angles greater in the nitrile ion (NO2-) or the nitrate ion (NO3-)?

a. Nitrite has the greater bond angle because a trigonal planar bond angle is greater than a tetrahedral bond angle

b. Nitrite has the greater bond angle because a linear bond angle is greater than a trigonal planar bond angle

c. Nitrate has the greater bond angle because nitrite’s lone pairs take up more space than bonds

d. Nitrate has the greater bond angle because double bonds take up more space than single bonds