QQuestionChemistry
QuestionChemistry
"What is the molecular geometry of SiH^4?
Bent
Linear
Tetrahedral
Trigonal pyramidal
Not enough information"
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Answer
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Step 1:I'll solve this problem step by step, following the specified LaTeX formatting guidelines:
Step 2:: Analyze the Central Atom
- The molecule is SiH₄ (silane) - Silicon (Si) is the central atom - Silicon has 4 hydrogen atoms attached
Step 3:: Determine Electron Configuration
- Total electron pairs around silicon = $$\frac{4 + 4}{2} = 4$$ bonding electron pairs
- Silicon is in Group 14 (4A) - Silicon has 4 valence electrons - Each hydrogen contributes 1 electron
Step 4:: Apply VSEPR Theory
- 4 electron pairs around central atom - All 4 pairs are bonding pairs - No lone pairs on the central atom
Step 5:: Predict Molecular Geometry
- 4 bonding pairs with no lone pairs - Electron pair geometry: Tetrahedral - Molecular geometry: Tetrahedral
Final Answer
The correct answer is Tetrahedral, which corresponds to option 3 in the given choices.
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