Chapter 9, Problem 104A

(a)

Interpretation Introduction

Interpretation: Formulas and names of the given compounds are to be stated. Also, it is needed to find out whether they are ionic or molecular compounds.

Concept Introduction: Molecular compounds are formed by the sharing of electrons between non-metals. They are also known as covalent compounds. The naming of these compounds is: Name of first element + Stem of second element + ‘ide’.

Answer to Problem 104A

The name of the given compound is phosphorous trichloride, with a chemical formula ${\text{PCl}}_{\text{3}}$ . It is a molecular compound.

Explanation of Solution

The given compound contains one phosphorous (P) atom and three chlorine (Cl) atoms. The prefix used for three is ‘tri’ thus the name of the compound is phosphorous trichloride. Since this compound is formed between two non-metals by the sharing of electrons, they are molecular compounds.

(b)

Interpretation Introduction

Interpretation: Formulas and names of the given compounds are to be stated. Also, it is needed to find out whether they are ionic or molecular compounds.

Concept Introduction: Molecular compounds are formed by the sharing of electrons between non-metals. They are also known as covalent compounds. The naming of these compounds is: Name of first element + Stem of second element + ‘ide’.

Answer to Problem 104A

The name of the given compound is disulphur dichloride. It is a molecular compound having a chemical formula ${\text{S}}_{\text{2}}{\text{Cl}}_{\text{2}}$ .

Explanation of Solution

The given compound contains two sulfur (S) atoms and two chlorine(Cl) atoms. The prefix used for two is ‘di’. Thus, the name of the compound is disulphur dichloride. Since this compound is formed between two non-metals by the sharing of electrons, they are molecular compounds.

(c)

Interpretation Introduction

Interpretation: Formulas and names of the given compounds are to be stated. Also, it is needed to find out whether they are ionic or molecular compounds.

Concept Introduction: Molecular compounds are formed by the sharing of electrons between non-metals. They are also known as covalent compounds. The naming of these compounds is: Name of first element + Stem of second element + ‘ide’.

Answer to Problem 104A

The name of the given compound is carbon tetrachloride, and its chemical formula is ${\text{CCl}}_{\text{4}}$ . It is a molecular compound.

Explanation of Solution

The given compound is formed between two non-metals carbon and chlorine. Hence, it is a molecular compound. It contains one carbon(C) atom and four chlorine(Cl) atoms. The prefix used for four is ‘tetra’ and thus, the name carbon tetrachloride.

(d)

Interpretation Introduction

Interpretation: Formulas and names of the given compounds are to be stated. Also, it is needed to find out whether they are ionic or molecular compounds.

Concept Introduction: Molecular compounds are formed by the sharing of electrons between non-metals. They are also known as covalent compounds. The naming of these compounds is: Name of first element + Stem of second element + ‘ide’.

Answer to Problem 104A

The name of the given compound is sulfur dichloride. It is a molecular compound with a chemical formula ${\text{SCl}}_{\text{2}}$ .

Explanation of Solution

The given compound contains two chlorine (Cl) atoms bonded to a sulfur (S) atom. The prefix used to denote two is ‘di’. Thus the name of the compound is sulfur dichloride. Since both sulfur and chlorine are non-metals, the compound is a molecular compound.