Chapter U2, Problem C7.1RE

(a)

Interpretation Introduction

Interpretation:The molecular formula for the given molecule needs to be determined.

Concept Introduction: The molecular formula of any compound tells the number of atoms of different elements present in the molecule.

Answer to Problem C7.1RE

Covalent bonds are formed by sharing of equal number of electrons. Molecular structure of any compound represents the presence of different atoms in a compound.

Explanation of Solution

The structure of the given compound is as follows:

  

This, the formula will be CH₃COOCH₂CH₂CH₃or C₅H₁₀O₂(Propyl ethanoate)

(b)

Interpretation Introduction

Interpretation: The Lewis dot structure of the molecule needs to be drawn.

Concept Introduction: Every element completes its octet to form bonds with different atoms.

Explanation of Solution

Lewis dot structure can be drawn with the help of valence electrons. Carbon has 4 valence electrons, oxygen has 6 valence electrons. To complete the octet, carbon will share 4 electrons, two electrons each with oxygen and form double covalent bond.

The given compound is as follows:

  

The Lewis dot structure will be:

  

(C)

Interpretation Introduction

Interpretation: The functional group in the molecule needs to be determined.

Concept Introduction: In a compound, functional group is a specific group which represents the chemical properties of the compound.

Explanation of Solution

Functional groups of different compounds have specific bonding between different atoms.

Ester group (- COOR ) Functional group is present in propyl acetate.

(d)

Interpretation Introduction

Interpretation: The smell of the compound needs to be predicted.

Concept Introduction: Specific functional group has specific smell,thus, different compounds have different type of smells.

Answer to Problem C7.1RE

Ester group compounds are generally sweet smelling.

Explanation of Solution

Ester (- COOR ) functional group is present in propyl acetate. It is a colorless liquid having a characteristic sweet smell like pear. It is used in nail paint removers, as a solvent, etc.