Chapter 9.1, Problem 2SP

(a)

Interpretation Introduction

Interpretation: The number of electrons lost or gain by the given ion is to be determined.

Concept Introduction : There are two types of charged species, anion (negatively charged species) and cation (positively charged species). Anion is formed by the gaining of an electron whereas a cation is formed by losing an electron. But there is no change in the protons or in other words, protons remain the same.

Answer to Problem 2SP

The number of electrons lost to form ${\text{Fe}}^{3+}$ ion is 3.

Explanation of Solution

The given ion is ${\text{Fe}}^{3+}$ . It is a cation as it has a positive charge. The 3+ charge indicates that it is formed by the loss of 3 electrons.

Thus, the number of electrons lost to form ${\text{Fe}}^{3+}$ ion is 3.

(b)

Interpretation Introduction

Interpretation: The number of electrons lost or gain by the given ion is to be determined.

Concept Introduction : There are two types of charged species, anion (negatively charged species) and cation (positively charged species). Anion is formed by the gaining of an electron whereas a cation is formed by losing an electron. But there is no change in the protons or, in other words, protons remain the same.

Answer to Problem 2SP

The number of electrons gain to form ${\text{O}}^{2-}$ ion is 2.

Explanation of Solution

The given ion is ${\text{O}}^{2-}$ . It is an anion as it has a negative charge. The 2- charge indicates that it is formed by gain of 2 electrons.

Thus, the number of electrons gain to form ${\text{O}}^{2-}$ ion is 2.

(c)

Interpretation Introduction

Interpretation: The number of electrons lost or gain by the given ion is to be determined.

Concept Introduction : There are two types of charged species, anion (negatively charged species) and cation (positively charged species). Anion is formed by the gaining of an electron whereas a cation is formed by losing an electron. But there is no change in the protons or, in other words, protons remain the same.

Answer to Problem 2SP

The number of electrons lost to form ${\text{Cu}}^{+}$ ion is 1.

Explanation of Solution

The given ion is ${\text{Cu}}^{+}$ . It is a cation as it has a positive charge. The 1+ charge indicates that it is formed by the loss of 1 electron.

Thus, the number of electrons lost to form ${\text{Cu}}^{+}$ ion is 3.

(d)

Interpretation Introduction

Interpretation: The number of electrons lost or gain by the given ion is to be determined.

Concept Introduction : There are two types of charged species, anion (negatively charged species) and cation (positively charged species). Anion is formed by the gaining of an electron whereas a cation is formed by losing an electron. But there is no change in the protons or, in other words, protons remain the same.

Answer to Problem 2SP

The number of electrons lost to form ${\text{Sr}}^{2+}$ ion is 2.

Explanation of Solution

The given ion is ${\text{Sr}}^{2+}$ . It is a cation as it has a positive charge. The 2+ charge indicates that it is formed by the loss of 2 electrons.

Thus, the number of electrons lost to form ${\text{Sr}}^{2+}$ ion is 2.