The dipole moment (μ) of HBr (a polar covalent molecule) is 0.824D (debye), and its percent...

The dipole moment (μ) of HBr (a polar covalent molecule) is 0.824D (debye), and its percent ionic character is 12.2 % . Estimate the bond length of the H−Br bond in picometers.

Note that

1 D=3.34×10−30 C⋅m and

in a bond with 100% ionic character, Q=1.6×10−19 C.

Express your answer to two significant figures and include the appropriate units.

Solutions

Expert Solution

% ionic character = Dobs / Dionic*100

Dionic = 0.824/12.2*100 = 6.754 D

= 6.754*3.34*10^-30 C.m

= 2.25*10^-29 C.m

Dionic = Q*d

Q = 1.6*10^-19 C.

d = bondlength

2.25*10^-29 = 1.6*10^-19*d

d = bond length = 1.4*10^-10 m

= 1.4*10^2 pm

queen_honey_blossom answered 2 years ago

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