Chapter 8, Problem 140A

Interpretation Introduction

(a)

Interpretation:

The name of compound having chemical formula $\text{NaI}$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the subscripts number tells the type and the number of each atom in a molecule.

Answer to Problem 140A

The name of compound having chemical formula $\text{NaI}$ is sodium iodide.

Explanation of Solution

The given chemical formula is $\text{NaI}$. The $\text{NaI}$ is made of sodium ion $\left({\text{Na}}^{+}\right)$ and iodide ion $\left({\text{I}}^{-}\right)$. Sodium ion has one positive charge and iodide ion has one negative charge. Therefore, the name of compound having chemical formula, $\text{NaI}$, is sodium iodide. Sodium iodide is an ionic solid.

Interpretation Introduction

(b)

Interpretation:

The name of compound having chemical formula $\text{Fe}{\left({\text{NO}}_3\right)}_{\text{3}}$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the subscripts number tells the type and the number of each atom in a molecule.

Answer to Problem 140A

The name of compound having chemical formula $\text{Fe}{\left({\text{NO}}_3\right)}_{\text{3}}$ is iron (III) nitrate.

Explanation of Solution

The given chemical formula is $\text{Fe}{\left({\text{NO}}_3\right)}_{\text{3}}$. The $\text{Fe}{\left({\text{NO}}_3\right)}_{\text{3}}$ is made up of two ion, first iron ion $\left({\text{Fe}}^{3+}\right)$ and second nitrate ion $\left({\text{NO}}_3^{-}\right)$. Iron has three positive charges and nitrate ion has one negative charge. To make neutral molecule, three nitrate ions are required. Therefore, the name of molecule having chemical formula, $\text{Fe}{\left({\text{NO}}_3\right)}_{\text{3}}$, is iron (III) nitrate.

Interpretation Introduction

(c)

Interpretation:

The name of compound having chemical formula $\text{Sr}{\left(\text{OH}\right)}_2$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the subscripts number tells the type and the number of each atom in a molecule.

Answer to Problem 140A

The name of compound having chemical formula $\text{Sr}{\left(\text{OH}\right)}_2$ is strontium hydroxide.

Explanation of Solution

The given chemical formula is $\text{Sr}{\left(\text{OH}\right)}_2$. The $\text{Sr}{\left(\text{OH}\right)}_2$ is made up of two ion, first strontium ion $\left({\text{Sr}}^{2+}\right)$ and second hydroxide ion $\left({\text{OH}}^{-}\right)$. Strontium has two positive charges and hydroxide ion has one negative charge. To make neutral molecule, two nitrate ions are required. Therefore, the name of molecule having chemical formula, $\text{Sr}{\left(\text{OH}\right)}_2$, is strontium hydroxide.

Interpretation Introduction

(d)

Interpretation:

The name of compound having chemical formula ${\text{CoCl}}_2$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the subscripts number tells the type and the number of each atom in a molecule.

Answer to Problem 140A

The name of compound having chemical formula ${\text{CoCl}}_2$ is cobalt (II) chloride.

Explanation of Solution

The given chemical formula is ${\text{CoCl}}_2$. The ${\text{CoCl}}_2$ is made up of two ion, first cobalt ion $\left({\text{Co}}^{2+}\right)$ and second chloride ion $\left({\text{Cl}}^{-}\right)$. Cobalt has two positive charges and chloride ion has one negative charge. To make neutral molecule, two chloride ions are required. Therefore, the name of molecule having chemical formula, ${\text{CoCl}}_2$, is cobalt (II) chloride.

Interpretation Introduction

(e)

Interpretation:

The name of compound having chemical formula $\text{Mg}{\left({\text{BrO}}_{\text{3}}\right)}_2$ is to be written.

Concept introduction:

In the molecular formula, the element symbols and the subscripts number tells the type and the number of each atom in a molecule.

Answer to Problem 140A

The name of compound having chemical formula $\text{Mg}{\left({\text{BrO}}_{\text{3}}\right)}_2$ is magnesium bromate.

Explanation of Solution

The given chemical formula is $\text{Mg}{\left({\text{BrO}}_{\text{3}}\right)}_2$. The $\text{Mg}{\left({\text{BrO}}_{\text{3}}\right)}_2$ is made up of magnesium ion, first magnesium ion $\left({\text{Mg}}^{2+}\right)$ and second bromate ion $\left({\text{BrO}}_3^{-}\right)$. Magnesium has two positive charges and bromate ion has one negative charge. To make neutral molecule, two bromate ions are required. Therefore, the name of molecule having chemical formula, $\text{Mg}{\left({\text{BrO}}_{\text{3}}\right)}_2$, is magnesium bromate.