Question

A)Draw a Lewis structure for BCl3 (remember that B is a frequent exception to the octet rule).

Part B

Determine molecular geometry of BCl3.

A)linear

B)bent

C)trigonal planar

D)trigonal pyramidal

Part C

What kind of intermolecular forces are present in BCl3? (Can be more then one)

A) dispersion force

B) dipole-dipole force

C) hydrogen bond

Part D

Draw a Lewis structure for HCOH (carbon is central; each H and O bonded directly to C)

Part E

Determine molecular geometry of HCOH.

A) linear

B) bent

C) trigonal planar

D) trigonal pyramidal

E)tetrahedral

Part F

What kind of intermolecular forces are present in HCOH? (Can be more then one)

A) dispersion force

B) dipole-dipole force

C) hydrogen bond

Answer 1

A)

B)

molecular geometry --A> Trigonal planar, since B is acting as a center and Cl is bonded to each other, note that B will not fulfill the octet, this is an exception

C)

BCl3 has no lone pair, so there are no dipole formation, therefore, it is nonpolar

it has only dispersion forces

E)

this msut be trigonal planar, since C has 120° angle between the atoms bonded to it

F)

this has --> dipoles, therefore it contians dipole-dipole forces as the strongest force