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Determine the molecular geometry of each molecule.(a) Problem 65P Chapter 10

Introductory Chemistry | 5th Edition

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Problem 65P

PROBLEM 65P

Determine the molecular geometry of each molecule.

(a) CBr4

(b) H2CO

(c) CS2

(d) BH3

Step-by-Step Solution:

Solution 65P

In order to predict the molecular geometry, we have to draw the Lewis structure of the given molecule and then molecular geometry can be predicted by VSEPR theory (steric number)

Steric number(SN) = (number of atoms bonded to central atom) +(number of lone pair on central atom) Step 1:

(a) CBr4

6C 1s2 2s2 2p2     35Br [Ar] 3d104s24p5

Total number of valence electrons in CBr4 = 4 +7(4)=32

Thus the Lewis structure is, Now we will calculate the steric number (SN) =

(number of atoms bonded to central atom) +(number of lone pair on central atom)

SN = 4 +0=4

SN is 4 i.e the molecule has tetrahedral shape with bond angle 109.5o, sp3 hybridization.

Step 2:

(b)H2CO

1H 1s1  6C 1s2 2s2 2p2    8O 1s2 2s2 2p4

Total number of valence electrons = 1(2)+4 +6 = 12

In H2CO, the C-atom is least electronegative than that of O atom, so it will be  the central atom.

Thus the Lewis structure is, steric number (SN) = (number of atoms bonded to central atom) +(number of lone pair on central atom)

SN = 3 +0=3

SN is 3 i.e the molecule has trigonal planar shape with bond angle 120o, sp2 hybridization.

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ISBN: 9780321910295

This full solution covers the following key subjects: cbr, determine, geometry, Molecular, molecule. This expansive textbook survival guide covers 19 chapters, and 2045 solutions. This textbook survival guide was created for the textbook: Introductory Chemistry, edition: 5. Since the solution to 65P from 10 chapter was answered, more than 287 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 65P from chapter: 10 was answered by Patricia, our top Chemistry solution expert on 05/06/17, 06:45PM. The answer to “Determine the molecular geometry of each molecule.(a) CBr4(b) H2CO(c) CS2(d) BH3” is broken down into a number of easy to follow steps, and 11 words. Introductory Chemistry was written by Patricia and is associated to the ISBN: 9780321910295.

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