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Scales of Electronegativity

calculate the...

Question

calculate the ratio of partial positive charge on H-atom in HCL to that in HI from the following data;
dipole moment of HCL = 1.03 D , Bond Length = 127 pm dipole moment of HI = .38 D Bond length = 161 pm>

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Solution

Dear student!
Dipole moment = charge x bond length
Putting the values for HCl,
q = Î¼ / d
Since, 1D = 10^-18 esu cm
1 nm = 10^-7 cm
So, q = 1.03 x 10^-18 esu cm / 127 x 10^-7 cm = 8.11 x 10^-14 esu
Similarly for HI,
1 pm = 10^-10 cm
q = 0.38 x 10^-18 esu cm / 161 x 10^-10 cm = 2.36 x 10^-11 esu.

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