Since we don’t know the Lewis structure for H2O and CCl4, 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 relative bond angles in CCl4 and H2O .
a. CCl4 bond angles > H2O bond angle
b. H2O bond angle > CCl4 bond angles
c. CCl4 bond angles = H2O bond angle
d. Relative bond angles cannot be predicted.
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