Question

1. Complete the following table:

Substance	Lewis Structure	Predicted Molecular geometry	Bond Angles	Polar Bonds	Molecular Polarity	Resonance (if any)
SO2
BF3
NF3

2. Complete the following table:

pH	pOH	[H3O+]	Acidic or Basic
6.88
		8.4 x 10-14
	3.11
		1.0 x 10-7

Answer 1

Ans 1 :

The molecular geometry of the molecules can be determined on the basis of VSEPR theory. The bonds are polar if they have considerable difference in their electrnegativity values.

If the dipole moment of all the bonds do not cancel out , the molecule becomes polar.

So here :

Substance	predicted molecular geometry	Bond angles	Polar bonds	Molecular polarity	Resonance (if any)
SO2	bent	120o	polar	polar	2 resonance structures
BF3	trigonal planar	120o	polar	non-polar	2 resonance structures
NF3	trigonal pyramidal	102.1o	polar	polar	no

Lewis structures of the molecules are shown below ...