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Question

Dipole moment of HX is 2.59×1030 coulomb-metre. Bond length of HX is 1.39˚A. Calculate percentage ionic character of molecule.

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Solution

Dipole Moment μ observed=2.59×1030 coulomb-metre.
Bond Length= 1.39Ao=1.39×1010 coulomb metre.
Charge=1.69×1019 C.
Ionic character=μBondLength×Charge
=2.59×10301.39×1010×1.69×1019
=2.59×10302.224×1029
=1.16×101
=0.116
Percentage Ionic Character=0.116×100=11.6%.

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