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What is dipole moment (mu) of bond ? Explain by example.

Answer»

Solution :Polar bonding : As a result of polarization, the molecule possesses the dipole MOMENT.
The dipole moment is defined as the product of the magnitude of the charge (Q) and the distance between the centres of POSITIVE and negative charge. "
Mathematically : `mu = Q xx r `
Where, Q = charge on atom in coulomb
r = Distance between to centre in METER.
`mu` = Dipole moment in Debye units and
` D = 3.33564 xx 10^(-30)` cm
Bond dipole moment express method : Dipole moment is a vector quantity and by convention. It is depicted by a small arrow `rarr` with tail on the negative centre `LARR` and head pointing towards the positive centre. In chemistry presence of dipole moment is represented by the CROSSED arrow `(rarr)` put on Lewis structure of the molecule. the cross in on positive and find arrow head is on negative end. For example the dipole moment of HF may be represented as
e.g., `underset("Polarity in bond")(H^(delta+)) - F^(delta-) "So"Hunderset("polarity in bond") overset(rarr)(-)underset(..)overset(..)(F):`


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