Chemistry Practice Problems Bond Angles Practice Problems Solution: Explain why the following ions have different bond...

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Solution: Explain why the following ions have different bond angles: CLO2- and NO2-. Predict the bond angle in each case.

Problem

Explain why the following ions have different bond angles: CLO2- and NO2-. Predict the bond angle in each case.

Solution

We’re being asked to predict the bond angles for ClO2and NO2- and explain why they have different bond angles


We need to do the following steps to predict and compare the bond angles for ClO2and NO2- 


Step 1: Determine the central atom for each ion.

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

Step 3: Draw the Lewis structure for each ion.

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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