Chapter 9, Problem 61A

(a)

Interpretation Introduction

Interpretation: The name of the given ion is to be stated.

Concept Introduction: Monoatomic cations can be simply named by writing the name of the element followed by the word ‘ion’. Monoatomic anions are named by adding the suffix ‘ide’ to the root name of the element. When naming polyatomic ions, the name of the cation is written first followed by the name of the anion.

Answer to Problem 61A

The name of the given ion is hydroxide ion.

Explanation of Solution

The given ion is a polyatomic ion that contains a hydrogen atom and an oxygen atom. Hydrogen atom bears a +1 charge whereas oxygen has a -2 charge giving the ion an overall -1 charge. the name of cation hydrogen is written first followed by the anion oxygen and the suffix ‘ide’.

(b)

Interpretation Introduction

Interpretation: The name of the given ion is to be stated.

Concept Introduction: Monoatomic cations can be simply named by writing the name of the element followed by the word ‘ion’. Monoatomic anions are named by adding the suffix ‘ide’ to the root name of the element. When naming polyatomic ions, the name of the cation is written first followed by the name of the anion.

Answer to Problem 61A

The given formula represents lead (IV) ion.

Explanation of Solution

The symbol Pb represents lead. The name of the ion is written by writing the name of the element followed by its charge in Roman numerals in parenthesis.

(c)

Interpretation Introduction

Interpretation: The name of the given ion is to be stated.

Concept Introduction: Monoatomic cations can be simply named by writing the name of the element followed by the word ‘ion’. Monoatomic anions are named by adding the suffix ‘ide’ to the root name of the element. When naming polyatomic ions, the name of the cation is written first followed by the name of the anion.

Answer to Problem 61A

The given formula represents sulfate ions.

Explanation of Solution

The sulfate ion contains one sulfur atom and four oxygen atoms. The name of an anion ends with the suffix ‘ate’ when the ion contains three or more atoms, one of which is an oxygen atom. Hence the name of ${\text{SO}}_{\text{4}}{}^{2-}$ is sulfate ion.

(d)

Interpretation Introduction

Interpretation: The name of the given ion is to be stated.

Concept Introduction: Monoatomic cations can be simply named by writing the name of the element followed by the word ‘ion’. Monoatomic anions are named by adding the suffix ‘ide’ to the root name of the element. When naming polyatomic ions, the name of the cation is written first followed by the name of the anion.

Answer to Problem 61A

The given formula represents oxide ions.

Explanation of Solution

It is an anion containing two oxygen atoms. The name of an anion ends with ‘ide’ if it contains two or less than two elements.