Question
Asked Feb 13, 2020
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What is the dipole moment for HF (bond length 0.917 Å), assuming
that the bond is completely ionic?
(a) 0.917 D (b) 1.91 D (c) 2.75 D (d) 4.39 D (e) 7.37 D

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Expert Answer

Step 1

Dipole Moment can be defined as the product of charge and distance of separation of charges of the chemically bonded atoms. It is denoted by symbol µ. The dipole moment is measured in Debye(D) or Coulomb Metre(Cm).

 

      Chemistry homework question answer, step 1, image 1

µ: Dipole Moment.

e: Charge on the bonded atoms.

d: distance of separation of the bonded atom(bond length).

Step 2

Chemistry homework question answer, step 2, image 1

Substitute the values from the question in the equation (1)-

Chemistry homework question answer, step 2, image 2

Since HF is completely ionic in nature, therefore a charge will be taken as of electron that is-

Chemistry homework question answer, step 2, image 3

Convert angstrom into a metre by the following transformation-

Chemistry homework question answer, step 2, image 4

...

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