Chapter 6, Problem 64E

Interpretation Introduction

Interpretation:

The table is to be completed by writing the chemical formulas for each of the compounds. The name of each compound is to be stated with the help of stock system name.

Concept introduction:

The compound which is composed of a nonmetal and a metal is known as the binary ionic compound. The overall charge of such compounds is neutral because the oppositely charged metal cations and nonmetal anions are bonded to each other.

In the chemical formula of binary compounds, the cation is present before the anion.

Answer to Problem 64E

The complete table is shown below.

IONS	fluoride ion	oxide ion	nitride ion
copper(II) ion	${\text{CuF}}_2$ Copper (II) fluoride	$\text{CuO}$ Copper (II) oxide	${\text{Cu}}_{\text{3}}{\text{N}}_{\text{2}}$ Copper (II) nitride
cobalt(II) ion	${\text{CoF}}_2$ Cobalt(II) fluoride	$\text{CoO}$ Cobalt(II) oxide	${\text{Co}}_{\text{3}}{\text{N}}_{\text{2}}$ Cobalt(II) nitride
lead(II) ion	${\text{PbF}}_2$ Lead(II) fluoride	$\text{PbO}$ Lead(II) oxide	${\text{Pb}}_{\text{3}}{\text{N}}_{\text{2}}$ Lead(II) nitride

Explanation of Solution

The stock system name is used to provide a proper naming to an ionic compound. According to this system of naming, the cation of the binary ionic compound is named as the same as atom and the anions of the compound ends with suffix -ide. The charge which is present over the metal cation is written in roman number inside the parentheses.

The name of the compound that is formed by the combination of cooper ion and fluoride ion is copper (II) fluoride. It contains positively charged copper ion, ${\text{Cu}}^{2+}$ and negatively charged fluoride ion, ${\text{F}}^{-}$. The charge on copper ion is $2+$ and the charge on fluoride ion is $1-$. The $2+$ charge of copper ion is neutralized by $1-$ charge of two fluoride ions. Therefore, the chemical formula of copper (II) fluoride is ${\text{CuF}}_2$ or ${\text{Cu}}^{2+}{\text{F}}^{-}$.

The name of the compound that is formed by the combination of copper ion and oxide ion is copper (II) oxide. It contains positively charged copper ion, ${\text{Cu}}^{2+}$ and negatively charged oxide ion, ${\text{O}}^{2-}$. The charge on copper ion is $2+$ and the charge on oxide ion is $2-$. The $2+$ charge of a copper ion is neutralized by $2-$ charge of an oxide ion. Therefore, the chemical formula of copper (II) oxide is $\text{CuO}$ or ${\text{Cu}}^{+}{\text{S}}^{2-}$.

The name of the compound that is formed by the combination of copper ion and nitride ion is copper (II) nitride. It contains positively charged copper ion, ${\text{Cu}}^{2+}$ and negatively charged nitride ion, ${\text{N}}^{3-}$. The charge on copper ion is $2+$ and the charge on nitride ion is $2+$. The $2+$ charge of three copper ions is neutralized by $3-$ charge of two nitride ions. Therefore, the chemical formula of copper (II) nitride is ${\text{Cu}}_{\text{3}}{\text{N}}_{\text{2}}$ or ${\text{Cu}}^{2+}{\text{N}}^{3-}$.

The name of the compound that is formed by the combination of cobalt ion and fluoride ion is cobalt (II) fluoride. It contains positively charged cobalt ion, ${\text{Co}}^{2+}$ and negatively charged fluoride ion, ${\text{F}}^{-}$. The charge on cobalt ion is $2+$ and the charge on fluoride ion is $1-$. The $2+$ charge of cobalt ion is neutralized by $1-$ charge of two fluoride ions. Therefore, the chemical formula of cobalt (II) fluoride is ${\text{CoF}}_{\text{2}}$ or ${\text{Co}}^{2+}{\text{F}}^{-}$.

The name of the compound that is formed by the combination of cobalt ion and oxide ion is cobalt (II) oxide. It contains positively charged cobalt ion, ${\text{Co}}^{2+}$ and negatively charged oxide ion, ${\text{O}}^{2-}$. The charge on cobalt ion is $2+$ and the charge on oxide ion is $2-$. The $2+$ charge of a cobalt ion is neutralized by $2-$ charge of an oxide ion. Therefore, the chemical formula of cobalt (II) oxide is $\text{CoO}$ or ${\text{Co}}^{2+}{\text{O}}^{2-}$.

The name of the compound that is formed by the combination of cobalt ion and nitride ion is cobalt (II) nitride. It contains positively charged cobalt ion, ${\text{Co}}^{2+}$ and negatively charged nitride ion, ${\text{N}}^{3-}$. The charge on cobalt ion is $2+$ and the charge on nitride ion is $3-$. The $2+$ charge of three cobalt ions is neutralized by $3-$ charge of two nitride ions. Therefore, the chemical formula of cobalt (II) nitride is ${\text{Co}}_{\text{3}}{\text{N}}_{\text{2}}$ or ${\text{Co}}^{2+}{\text{N}}^{3-}$.

The name of the compound that is formed by the combination of lead ion and fluoride ion is lead (II) fluoride. It contains positively charged lead ion, ${\text{Pb}}^{2+}$ and negatively charged fluoride ion, ${\text{F}}^{-}$. The charge on lead ion is $2+$ and the charge on fluoride ion is $1-$. The $2+$ charge of lead is neutralized by $1-$ charge of two fluoride ions. Therefore, the chemical formula of lead (II) fluoride is ${\text{PbF}}_2$ or ${\text{Pb}}^{2+}{\text{F}}^{-}$.

The name of the compound that is formed by the combination of lead ion and oxide ion is lead (II) oxide. It contains positively charged lead ion, ${\text{Pb}}^{2+}$ and negatively charged oxide ion, ${\text{O}}^{2-}$. The charge on lead ion is $2+$ and the charge on oxide ion is $2-$. The $2+$ charge of a lead ion is neutralized by $2-$ charge of an oxide ion. Therefore, the chemical formula of lead (II) oxide is $\text{PbO}$ or ${\text{Pb}}^{2+}{\text{O}}^{2-}$.

The name of the compound that is formed by the combination of lead ion and nitride ion is lead (II) nitride. It contains positively charged lead ion, ${\text{Pb}}^{2+}$ and negatively charged nitride ion, ${\text{N}}^{3-}$. The charge on lead ion is $2+$ and the charge on nitride ion is $3-$. The $2+$ charge of three lead ions is neutralized by $3-$ charge of two nitride ions. Therefore, the chemical formula of lead (II) nitride is ${\text{Pb}}_3{\text{N}}_2$ or ${\text{Pb}}^{2+}{\text{N}}^{3-}$.

Conclusion

The complete table is shown below.

IONS	fluoride ion	oxide ion	nitride ion
copper(II) ion	${\text{CuF}}_2$ Copper (II) fluoride	$\text{CuO}$ Copper (II) oxide	${\text{Cu}}_{\text{3}}{\text{N}}_{\text{2}}$ Copper (II) nitride
cobalt(II) ion	${\text{CoF}}_2$ Cobalt(II) fluoride	$\text{CoO}$ Cobalt(II) oxide	${\text{Co}}_{\text{3}}{\text{N}}_{\text{2}}$ Cobalt(II) nitride
lead(II) ion	${\text{PbF}}_2$ Lead(II) fluoride	$\text{PbO}$ Lead(II) oxide	${\text{Pb}}_{\text{3}}{\text{N}}_{\text{2}}$ Lead(II) nitride