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QuestionChemistry

Determine the molecular geometry, or shape, of ClO₂. A. octahedral B. tetrahedral C. trigonal bipyramidal D. trigonal planar E. T-shaped F. bent
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Answer

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Step 1:
Let's solve this step by step using VSEPR (Valence Shell Electron Pair Repulsion) theory:

Step 2:
: Determine the number of valence electrons

- Chlorine (Cl): 7 valence electrons - Oxygen (O): 6 valence electrons × 2 = 12 valence electrons - Total valence electrons: 7 + 12 = 19 valence electrons

Step 3:
: Draw the Lewis structure

- Chlorine is the central atom - Connect two oxygen atoms to chlorine with single bonds - Distribute remaining electrons as lone pairs - Chlorine will have one lone pair - Oxygen atoms will have complete octets

Step 4:
: Count electron domains around the central chlorine atom

- 2 single bonds to oxygen atoms - 1 lone pair on chlorine - Total electron domains: 3

Step 5:
: Determine electron domain geometry

- 3 electron domains suggests trigonal planar electron domain geometry

Step 6:
: Determine molecular geometry

- With 3 total domains (2 bonding, 1 lone pair) - This results in a bent molecular geometry

Step 7:
: Verify the shape characteristics

- Lone pair causes deviation from perfect trigonal planar - Angle will be less than 120° - Shape is bent (V-shaped)

Final Answer

T-shaped The key reasoning is the presence of 3 electron domains with a lone pair, which causes the T-shaped molecular geometry of ClO₂.