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For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give the expected hybrid orbitals of the central atom, and predict the overall polarity. a. CF 4 b. NF 3 c. OF 2 d. BF 3 e. BeH 2 f. TeF 4 g. AsF 5 h. KrF 2 i. KrF 4 j. SeF 6 k. IF 5 l. IF 3

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Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243

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Section
BuyFindarrow_forward

Chemistry: An Atoms First Approach

2nd Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781305079243
Chapter 4, Problem 49E
Textbook Problem
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For each of the following molecules, write the Lewis structure(s), predict the molecular structure (including bond angles), give the expected hybrid orbitals of the central atom, and predict the overall polarity.

a. CF4

b. NF3

c. OF2

d. BF3

e. BeH2

f. TeF4

g. AsF5

h. KrF2

i. KrF4

j. SeF6

k. IF5

l. IF3

(a)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for CF4 .

Explanation of Solution

The atomic number of carbon is 6 and its electronic configuration is,

1s22s22p4

The valence electrons present in carbon are four.

The atomic number of fluorine is 9 and its electronic configuration is,

1s22s22p5

The valence electron of fluorine is 7

The molecule CF4 is made of four fluorine atoms and one carbon atom. Hence, the total number of valence electrons is,

C+4F=(4+(4×7))e=32e

The formula of number of electron pairs is,

X=V+M±C2

Where,

  • X is number of electron pairs

(b)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for NF3 .

(c)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for OF2 .

(d)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for BF3 .

(e)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for BeH2 .

(f)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for TeF4 .

(g)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for AsF5 .

(h)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for KrF2 .

(i)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for KrF4 .

(j)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for SeF6 .

(k)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for IF5 .

(l)

Interpretation Introduction

Interpretation: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for each species is to be determined.

Concept introduction: Molecular structure is a three-dimensional shape of a molecule. The following steps are to be followed to determine the hybridization and the molecular structure of a given compound,

  • The central atom is identified.
  • Its valence electrons are determined.
  • 1e is added to the total number of valence electrons for each monovalent atom present.
  • The total number obtained is divided by 2 , to find the number of electron pairs.
  • This further gives us the hybridization of the given compound.

A Lewis structure depicts the bonding between the atoms, present in a molecule and also the number of lone pairs present in the structure.

To determine: The Lewis structure; the molecular structure; the expected hybridization of the central atom and the overall polarity for IF3 .

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Chapter 4 Solutions

Chemistry: An Atoms First Approach
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