1. A Review of General Chemistry

Which molecule/s contain/snet dipoles?

Which molecule/s contain/snet dipoles?

Which molecule/s contain/snet dipoles?

Which of the solvents are apolar and polar?

For each compound, state whether its bonding is covalent, ionic, or a mixture of covalent and ionic.

a. NaCl

b. NaOH

c. CH₃Li

d. CH₂Cl₂

e. NaOCH₃

f. HCO₂Na

g. CF₄

Use electronegativities to predict the direction of the dipole moments of the following bonds.

(f) N—Cl

(g) N—O

(h) N—S

(i) N—B

(j) B—Cl

Use the symbols δ⁺ and δ⁻ to show the direction of the polarity of the indicated bond in each of the following compounds:

g. I—Cl

h. H₂N—OH

Use the symbols δ⁺ and δ⁻ to show the direction of the polarity of the indicated bond in each of the following compounds:

c. H₃C—NH₂

d. H₃C—Cl

There are three isomers with molecular formula C₂H₂Cl₂. Draw their structures. Which one does not have a dipole moment?

Explain why CH₃Cl has a greater dipole moment than CH₃F even though F is more electronegative than Cl.

Which of the following molecules would you expect to have a dipole moment of zero?

a. CH₃CH₃

b. H₂C═O

c. CH₂Cl₂

1. CH₃N₂⁺
2. HNO₃
3. N₃^-
4. CH₃CONH₂
5. O₃

b. Draw a structure for each of the species that shows approximate bond angles.

c. Which species have no dipole moment?