Data for three hydrogen halides are provided

CHEMISTRY · Single correct · A Level · Chemistry · Bonding · Bonding

Problem

Data for three hydrogen halides are provided. • HCl: bond length

1.27\,\text{Å}

, measured dipole moment

1.08\,\text{D}

, 100% ionic dipole

6.10\,\text{D}

• HF: bond length

0.92\,\text{Å}

, measured dipole moment

1.83\,\text{D}

, 100% ionic dipole

4.80\,\text{D}

• HI: bond length

1.61\,\text{Å}

, measured dipole moment

0.44\,\text{D}

, 100% ionic dipole

7.55\,\text{D}

Which ranking from highest to lowest percent ionic character is most consistent with the data? (a)

HI > HCl > HF

(b)

HF > HI > HCl

(c)

HF > HCl > HI

(d)

HCl > HF > HI