August 29 - Lecture #3, August 29, 2008 ConcepTest (CT)...

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Lecture #3, August 29, 2008 ConcepTest (CT) What happens to the dipole moment ( μ ) from HF to HCl to HBr to HI? (A) μ remains constant (B) μ increases (C) μ decreases This is a challenging question as the trends in bond length and electronegativity differences are in opposite directions. A look at the data is helpful! The goal of this question is to train you to look at data critically as you look for patterns and inferences. Compound Bond Length, Angstroms Difference in Electronegativity Dipole moment in Debye Units (D) HF 0.92 1.9 1.82 HCl 1.27 0.9 1.08 HBr 1.41 0.7 0.82 HI 1.61 0.4 0.44 Note: Bond length increases while electronegativity difference decreases from HF to HI; dipole moment decreases showing that the difference in electronegativity has a greater effect on μ . . Theories of Covalent Bonding (continued) Hybrid Orbitals (to be reviewed in recitation) Please review these energy level diagrams. sp
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This note was uploaded on 02/25/2010 for the course CHEM 3311 at Colorado.

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August 29 - Lecture #3, August 29, 2008 ConcepTest (CT)...

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