Chapter 17, Problem 112A

(a)

Interpretation Introduction

Interpretation: The chemical formula of the given compound is to be written.

Concept Introduction : Ionic compounds are formed by the transfer of electrons between metal and non-metal. The cation is the positively charged ion formed by the loss of electrons and the anion is the negatively charged ion formed by the gain of an electron.

The nomenclature includes the name of the cation followed by the name of the anion.

Answer to Problem 112A

The chemical formula of the compound is ${\text{K}}_{\text{3}}\text{N}$

Explanation of Solution

The given name of the compound is potassium nitride. It is composed of ${\text{K}}^{+}$ and ${\text{N}}^{\text{3-}}$ . We write the chemical formula by the criss-cross method where the charge of the ion is crossed over to become the subscript of the other ion. Thus, the chemical formula of the compound will be ${\text{K}}_{\text{3}}\text{N}$ .

(b)

Interpretation Introduction

Interpretation: The chemical formula of the given compound is to be written.

Concept Introduction : Ionic compounds are formed by the transfer of electrons between metal and non-metal.

The cation is the positively charged ion formed by the loss of electrons and the anion is the negatively charged ion formed by the gain of an electron.

Answer to Problem 112A

The chemical formula of the compound is ${\text{Al}}_{\text{2}}{\text{S}}_{\text{3}}$ .

Explanation of Solution

The given name of the compound is aluminum sulphide. It is composed of ${\text{Al}}^{\text{3+}}$ and ${\text{S}}^{\text{2-}}$ . We write the chemical formula by the criss-cross method where the charge of the ion is crossed over to become the subscript of the other ion. Thus, the chemical formula of the compound will be ${\text{Al}}_{\text{2}}{\text{S}}_{\text{3}}$ .

(c)

Interpretation Introduction

Interpretation: The chemical formula of the given compound is to be written.

Concept Introduction : Ionic compounds are formed by the transfer of electrons between metal and non-metal.

The cation is the positively charged ion formed by the loss of electrons and the anion is the negatively charged ion formed by the gain of an electron.

Answer to Problem 112A

The chemical formula of the compound is ${\text{Ca(NO}}_{\text{3}}{\text{)}}_{\text{2}}$ .

Explanation of Solution

The given name of the compound is calcium nitrate. It is composed of ${\text{Ca}}^{\text{2+}}$ and ${\text{NO}}_{\text{3}}{}^{\text{-}}$ . We write the chemical formula by the criss-cross method where the charge of the ion is crossed over to become the subscript of the other ion. Thus, the chemical formula of the compound will be.

  ${\text{Ca(NO}}_{\text{3}}{\text{)}}_{\text{2}}$ .

(d)

Interpretation Introduction

Interpretation: The chemical formula of the given compound is to be written.

Concept Introduction : Ionic compounds are formed by the transfer of electrons between metal and non-metal.

The cation is the positively charged ion formed by the loss of electrons and the anion is the negatively charged ion formed by the gain of an electron.

Answer to Problem 112A

The chemical formula of the compound is ${\text{CaSO}}_{\text{4}}$ .

Explanation of Solution

The given name of the compound is calcium sulphate. It is composed of ${\text{Ca}}^{\text{2+}}$ and ${\text{SO}}_4{}^{2-}$ . We write the chemical formula by the criss-cross method where the charge of the ion is crossed over to become the subscript of the other ion. Thus, the chemical formula of the compound will be ${\text{CaSO}}_{\text{4}}$ .