QQuestionChemistry
QuestionChemistry
Is CHCl₃ (chloroform) a polar or nonpolar molecule, and how does its tetrahedral geometry contribute to its polarity or nonpolarity?
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Answer
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Step 1:I'll solve this problem step by step, focusing on molecular geometry and polarity:
Step 2:: Understand the Molecular Structure
- CHCl₃ has a central carbon atom - The carbon forms four bonds in a tetrahedral geometry - Bonds are to one hydrogen and three chlorine atoms
Step 3:: Electronegativity Analysis
- Carbon is moderately electronegative: $$\chi_{C} = 2.55
- Hydrogen is less electronegative: \chi_{H} = 2.20
Step 4:: Bond Polarity Evaluation
\vec{\mu}_{C-H} = \text{minimal polar vector}
- C-Cl bonds are polar due to electronegativity difference - C-H bond is slightly polar
Step 5:: Geometric Consideration
- Tetrahedral geometry with $$109.5^\circ$$ bond angles
- Chlorine atoms are symmetrically positioned
Step 6:: Net Molecular Polarity Determination
- Individual C-Cl bond dipoles do not completely cancel - Resulting molecule has a net dipole moment - CHCl₃ is a POLAR molecule
Final Answer
CHCl₃ (chloroform) is a POLAR molecule, with its polarity arising from asymmetric distribution of electronegative chlorine atoms around the central carbon in a tetrahedral configuration.
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