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QuestionChemistry

Which of the following is the correct molecular geometry for the phosphate ion, PO^3 - 4?
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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:
: Identify the Central Atom

The central atom in the phosphate ion $$PO_{4}^{3-}$$ is phosphorus (P).

Step 3:
: Determine the Number of Valence Electrons

- Total valence electrons: $$5 + 24 + 3 = 32$$ electrons
- Phosphorus: 5 valence electrons - Oxygen (4 atoms): 4 × 6 = 24 valence electrons - Charge of - 3: Add 3 electrons

Step 4:
: Draw the Lewis Structure

- Phosphorus is the central atom - Four oxygen atoms bond to phosphorus - One oxygen will have a negative charge - Electrons are distributed to achieve octet for all atoms

Step 5:
: Determine Electron Geometry

- Total electron domains around central atom: 4 - Electron geometry: Tetrahedral

Step 6:
: Determine Molecular Geometry

- All 4 electron domains are bonding domains - No lone pairs on central phosphorus atom - Molecular geometry: Tetrahedral

Final Answer

The molecular geometry of the phosphate ion PO_{4}^{3 -} is tetrahedral.