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˚
Predict the actual bond angle(s) in nitrite (best estimate):
A. 180° exactly B. < 90° C. < 109.5° D. < 120°
E. < 180°
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What scientific concept do you need to know in order to solve this problem?
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