Chapter 4, Problem 14A

(a)

Interpretation Introduction

Interpretation:

The name of given binary compound CaF₂is to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.
• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

1. Name of metal cation is written as name of element.
2. Name of anion is written using root name and adding ‘ide’ to it.
3. Writing these names in the same sequence gives the name of compound.

Type-II:

1. Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
2. Name of anion is written using root name and adding ‘ide’ to it.
3. Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Calcium fluoride

Explanation of Solution

The binary compound $Ca{F}_2$ is of type-I.

Rules for naming these compounds:

1. Name of metal cation is written as name of element.
2. Name of anion is written using root name and adding ‘ide’ to it.
3. Writing these names in the same sequence gives the name of compound.

It is named as Calcium fluoride.

(b)

Interpretation Introduction

Interpretation:

The name of given binary compound BaOis to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.
• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-II:

• Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Barium oxide

Explanation of Solution

The binary compound $BaO$ is of type-I.

Rules for naming these compounds:

1. Name of metal cation is written as name of element.
2. Name of anion is written using root name and adding ‘ide’ to it.
3. Writing these names in the same sequence gives the name of compound.

It is named as Barium oxide.

(c)

Interpretation Introduction

Interpretation:

The name of given binary compound N₂O₅is to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.
• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-II:

• Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Nitrogen pentoxide

Explanation of Solution

The binary compound $N_2{O}_5$ is of type-III.

Rules for naming Type-III compounds:

• It is name by writing the name of first element as same as element.
• Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for first element.

The given compound has 2 N and 5O atoms. It is named as Nitrogen pentoxide.

(d)

Interpretation Introduction

Interpretation:

The name of given binary compound K₂S is to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.
• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

• Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Potassium sulphide

Explanation of Solution

The binary compound $K_{2}S$ is of type-I.

Rules for naming these compounds:

1. Name of metal cation is written as name of element.
2. Name of anion is written using root name and adding ‘ide’ to it.
3. Writing these names in the same sequence gives the name of compound.

The given compound has 2 K and 1 S atom. It is named as Potassium sulphide.

(e)

Interpretation Introduction

Interpretation:

The name of given binary compound SO₂is to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.
• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-II:

• Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Sulphur dioxide

Explanation of Solution

The binary compound $S{O}_2$ is of type-III.

Rules for naming Type-III compounds:

• It is name by writing the name of first element as same as element.
• Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for first element.

There are 1 S and 2 O atoms thus, the compound is named as Sulphur dioxide.

(f)

Interpretation Introduction

Interpretation:

The name of given binary compound Mg₃N₂ is to be written.

Concept introduction:

To name a compound, certain rules are followed. The given compounds are binary compounds.

Binary compounds are of three types:

• Type-I: Compound in which a metal forms ionic bond with a non-metal and the metal can form only one type of ions.

• Type-II: Compound in which a metal forms ionic bond with a non-metal and the metal can form more than one type of ions.
• Type-III: Compound in which a non-metal forms bond with a non-metal.

Rules for naming these compounds:

Type-I:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-II:

• Name of metal cation is written as name of element followed by charge carried by it in roman numerals in bracket.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Type-III:

1. It is name by writing the name of first element as same as element.
2. Second element in anionic form and prefixes are used to denote the number of atoms. Prefix mono is not used for 1element.

Answer to Problem 14A

Magnesium nitride

Explanation of Solution

The binary compound $M{g}_3{N}_2$ is of type-I.

Rules for naming these compounds:

• Name of metal cation is written as name of element.
• Name of anion is written using root name and adding ‘ide’ to it.
• Writing these names in the same sequence gives the name of compound.

Given compound have 3 Mg and 2 N atoms. It is named as Magnesium nitride.