Chapter 6, Problem 19E

Interpretation Introduction

(a)

Interpretation:

The chemical formula for the ternary compound, strontium nitrite, given its constituent atoms, ${\text{Sr}}^{\text{2+}}$ and ${\text{NO}}_{\text{2}}{}^{-}$, is to be stated.

Concept introduction:

Compounds containing a metal and more than one other element are termed as ternary ionic compounds. The charge on the ternary ionic compounds must always be neutral, no matter what the charges on the individual ions are.

Answer to Problem 19E

The chemical formula for the ternary compound, strontium nitrite is $\text{Sr}{\left({\text{NO}}_{\text{2}}\right)}_2$.

Explanation of Solution

The ternary compound, strontium nitrite contains ${\text{Sr}}^{\text{2+}}$ and ${\text{NO}}_{\text{2}}{}^{-}$ as constituent ions. The strontium ion has a charge of $+2$ and the nitrite ion has a charge of $-1$. One positive ion is required to cancel the charge of two negative ions in the formula unit. Therefore, the chemical formula of strontium nitrite is $\text{Sr}{\left({\text{NO}}_{\text{2}}\right)}_2$.

Conclusion

The chemical formula for the ternary compound, strontium nitrite is $\text{Sr}{\left({\text{NO}}_{\text{2}}\right)}_2$.

Interpretation Introduction

(b)

Interpretation:

The chemical formula for the ternary compound, zinc permanganate, given its constituent atoms, ${\text{Zn}}^{2+}$ and ${\text{MnO}}_{\text{4}}{}^{-}$, is to be stated.

Concept introduction:

Compounds containing a metal and more than one other element are termed as ternary ionic compounds. The charge on the ternary ionic compounds must always be neutral, no matter what the charges on the individual ions are.

Answer to Problem 19E

The chemical formula for the ternary compound, zinc permanganate is $\text{Zn}{\left({\text{MnO}}_4\right)}_2$.

Explanation of Solution

The ternary compound, zinc permanganate contains ${\text{Zn}}^{2+}$ and ${\text{MnO}}_{\text{4}}{}^{-}$ as constituent ions. The ${\text{Zn}}^{2+}$ ion has a charge of $+2$ and the ${\text{MnO}}_{\text{4}}{}^{-}$ ion has a charge of $-1$. Therefore, two negative ions are required to cancel the charge of one positive ion in the formula unit. Therefore, the chemical formula of zinc permanganate is $\text{Zn}{\left({\text{MnO}}_4\right)}_2$.

Conclusion

The chemical formula for the ternary compound, zinc permanganate is $\text{Zn}{\left({\text{MnO}}_4\right)}_2$.

Interpretation Introduction

(c)

Interpretation:

The chemical formula for the ternary compound, calcium chromate, given its constituent atoms, ${\text{Ca}}^{2+}$ and ${\text{Cr}}_2{\text{O}}_4{}^{2-}$, is to be stated.

Concept introduction:

Compounds containing a metal and more than one other element are termed as ternary ionic compounds. The charge on the ternary ionic compounds must always be neutral, no matter what the charges on the individual ions are.

Answer to Problem 19E

The chemical formula for the ternary compound, calcium chromate is ${\text{CaCrO}}_{\text{4}}$.

Explanation of Solution

The ternary compound, calcium chromate contains ${\text{Ca}}^{2+}$ and ${\text{CrO}}_4{}^{2-}$ as constituent ions. The ${\text{Ca}}^{2+}$ ion has a charge of $+2$ and the ${\text{CrO}}_4{}^{2-}$ ion has a charge of $-2$. Therefore, one negative ion is required for each positive ion in the formula unit. Therefore, the chemical formula of calcium chromate is ${\text{CaCrO}}_{\text{4}}$.

Conclusion

The chemical formula for the ternary compound, calcium chromate is ${\text{CaCrO}}_{\text{4}}$.

Interpretation Introduction

(d)

Interpretation:

The chemical formula for the ternary compound, nickel $\left(\text{II}\right)$ perchlorate, given its constituent atoms, ${\text{Ni}}^{\text{2+}}$ and ${\text{ClO}}_4{}^{-}$, is to be stated.

Concept introduction:

Compounds containing a metal and more than one other element are termed as ternary ionic compounds. The charge on the ternary ionic compounds must always be neutral, no matter what the charges on the individual ions are.

Answer to Problem 19E

The chemical formula for the ternary compound, nickel $\left(\text{II}\right)$ perchlorate is $\text{Ni}{\left({\text{ClO}}_4\right)}_{\text{2}}$.

Explanation of Solution

The ternary compound, nickel $\left(\text{II}\right)$ perchlorate contains ${\text{Ni}}^{\text{2+}}$ and ${\text{ClO}}_4{}^{-}$ as constituent ions. The ${\text{Ni}}^{\text{2+}}$ ion has a charge of $+2$ and the ${\text{ClO}}_4{}^{-}$ ion has a charge of $-1$. Therefore, one positive ion is required to cancel the charge of two negative ions in the formula unit. Therefore, the chemical formula of nickel $\left(\text{II}\right)$ perchlorate is $\text{Ni}{\left({\text{ClO}}_4\right)}_{\text{2}}$.

Conclusion

The chemical formula for the ternary compound, nickel $\left(\text{II}\right)$ perchlorate is $\text{Ni}{\left({\text{ClO}}_4\right)}_{\text{2}}$.