Chapter 4, Problem 21A

(a)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Iron (III) nitrate.

Explanation of Solution

Fe is the symbol for Iron. It exhibits +3 oxidation state and the anion is nitrate.

(b)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Cobalt (III) phosphate.

Explanation of Solution

Co is the symbol for Cobalt. It exhibits +3 oxidation state and the anion is phosphate.

(c)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Chromium (III) cyanide.

Explanation of Solution

Cr is the symbol for Chromium. It exhibits +3 oxidation state and the anion is cyanide.

(d)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Aluminium sulfate.

Explanation of Solution

Al is the symbol for Iron. It exhibits +3 oxidation states and it is the only oxidation state that it exhibits. The anion is sulfate.

(e)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Chromium (II) acetate.

Explanation of Solution

Cr is the symbol for Chromium. It exhibits +2 oxidation state and the anion is acetate.

(f)

Interpretation Introduction

Interpretation: Names of the compounds are to be given.

Concept Introduction: The given compounds are inorganic compounds. An inorganic compound consists of a cation and an anion where cation is a positively charged ion and anion is a negatively charged ion. While writing the name of the compound, cation is written first followed by the oxidation state of the metal ion written in roman numerals in parenthesis which is further followed by the name of anion. Oxidation state is written only in cases when the involved metal ion exhibits multiple oxidation states.

Answer to Problem 21A

The name of compound is Ammonium sulfite.

Explanation of Solution

NH₄+ is the symbol for Ammonium ion. It is a polyatomic cation with one positive charge. The anion is sulfite.