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QuestionChemistry

Is BrF₃ nonpolar or polar?
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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:
: Determine the molecular geometry

\text{Molecular geometry: T-shaped}
- BrF₃ has a central bromine (Br) atom with three fluorine (F) atoms - Using VSEPR theory, this creates a T-shaped molecular geometry

Step 3:
: Analyze the electronegativity

\Delta\text{Electronegativity} = |3.98 - 2.96| = 1.02
- Bromine electronegativity: 2.96 - Fluorine electronegativity: 3.98 - There is a significant electronegativity difference between Br and F

Step 4:
: Examine bond polarities

\text{Br}^{\delta+} - \text{F}^{\delta-}
- The Br-F bonds are polar due to the electronegativity difference - Fluorine is more electronegative, creating partial negative charge

Step 5:
: Assess molecular symmetry

- The T-shaped geometry means the bond dipoles do not cancel - Unequal distribution of charge creates a net dipole moment

Final Answer

BrF₃ is a polar molecule due to its asymmetric T-shaped geometry and polar Br-F bonds.