For LiBr, the dipole moment (measured in the gas phase) and the bond length (measured in the solid state) are 7.268 D and 217 pm, respectively. For NaCl, the corresponding values are 9.001 D and 236.1 pm.

(a) Calculate the percent ionic character for each bond. 

(b) Compare these values with the expected ionic character based on differences in electronegativity (see Figure 10-7). 

(c) Account for any differences in the values obtained in these two different ways.

Figure 10-7

Transcribed Image Text:

Percent ionic character 100 75 50 25 HI IBr 0 0 ICI HCI HBr KCI CSI KBr KI LiBr LICI CSCI Lil NaCl HF 2 Electronegativity difference LiF KF. CsF 3