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Answer: Draw a Lewis structure for each molecule and determine its molecular geometry

Chapter 12, Problem 98P

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QUESTION:

Draw a Lewis structure for each molecule and determine its molecular geometry. What kind of intermolecular forces are present in each substance?

(a) \(\mathrm{BCl}_{3}\) (remember that B is a frequent exception to the octet rule)

(b) \(\mathrm{HCOH}\) (carbon is central; each H and O bonded directly to C)

(c) \(C S_{2}\)

(d) \(\mathrm{NCl}_{3}\)

Equation Transcription:

Text Transcription:

BCl_3

HCOH

CS_2

NCl_3

Questions & Answers

QUESTION:

Draw a Lewis structure for each molecule and determine its molecular geometry. What kind of intermolecular forces are present in each substance?

(a) \(\mathrm{BCl}_{3}\) (remember that B is a frequent exception to the octet rule)

(b) \(\mathrm{HCOH}\) (carbon is central; each H and O bonded directly to C)

(c) \(C S_{2}\)

(d) \(\mathrm{NCl}_{3}\)

Equation Transcription:

Text Transcription:

BCl_3

HCOH

CS_2

NCl_3

ANSWER:

Solution 98P

Here , we have to draw a Lewis structure for each molecule and determine its molecular geometry. And mention the kind of intermolecular forces that are present in each substance.

(a) BCl3 (remember that B is a frequent exception to the octet rule) :

Lewis structure :

        

Molecular geometry :

The molecular geometry of BCl3 is trigonal planar with symmetric charge distribution around the central atom.

Intermolecular forces :

BCl3 has three polar B-Cl bonds but because of the symmetry of the molecule these bond moments cancel and the BCl3 molecule is nonpolar. Hence the intermolecular forces acting in BCl3 are Dispersion(London) forces.

(b) HCOH (carbon is central; each H and O bonded directly to C) :

Lewis structure :

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