Covalent Bonding, Electronegativity, and Bond

Chapter , Problem 43E

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Problem 43E

Covalent Bonding, Electronegativity, and Bond Polarity (Sections)

(a) From the data in Table calculate the effective charges on the H and Br atoms of the HBr molecule in units of the electronic charge, e.

Table Bond Lengths, Electronegativity Differences, and Dipole Moments of the Hydrogen Halides

Compound

Bond Length (Å)

Electro negativity Difference

Dipole Moment (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

(b) If you were to put HBr under very high pressure, so its bond length decreased significantly, would its dipole moment increase, decrease, or stay the same, if you assume that the effective charges on the atoms do not change?

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