Question

2. Ionic and Covalent Character: H2, HF, and LiH. Note: Be sure you indicated the direction of the dipole on each molecule in your Table a. Rank the dipoles from smallest to largest: Hal iH b. Compare the electronegativities& the relative magnitudes of the dipole moments for each of these molecul es-do they match up like you would expect them to? Explain. c. Which molecule is the most ionic? The most covalent? d. Which does the direction of the dipole tell you? more electran gative atom e. Using just the relative magnitudes of the dipole moments of the molecules from Spartan, explain what they tell you about the bond's ionic or covalent character.

b and e

Answer 1

A) HF dipole =2.17 debe

LIH dipole =5.99 debe

H₂ dipole is = less 2

rank according to dipole H₂ < HF <LIH

b) if When two electrical charges, of opposite sign and equal magnitude,The size of a dipole is measured by its dipole moment $\mu$ .Electronegativity is the strength an atom has to attract a bonding pair of electrons to itself automatically.

H......>>F LI<<<.........H H$\rightleftharpoons$H

C) LIH is most molecule ionic

because LiH is difference in electronegativity is H - Li, since H is more electronegative in this case, (2.2 - 0.78),

which is =1.42. this is main cause for most ionic

and most covalent is H₂ covalent bond is formed by sharing electrons

D) HF is the more electronegativity or direction of dipole And its value is 1.9