Chapter 2, Problem 127GQ

Write the formula for each of the following pounds and indicate which ones are best described as ionic:

(a) sodium hypochlorite

(b) boron triiodide

(c) aluminum perchlorate

(d) calcium acetate

(e) potassium permanganate

(f) ammonium sulfite

(g) potassium dihydrogen phosphate

(h) disulfur dichloride

(i) chlorine trifluoride

(j) phosphorus trilluoride

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

    $NaClO\to Ionic$

Explanation of Solution

The name of the given compound is sodium hypochlorite. And its molecular formula is $NaClO$

In this compound sodium $\left(Na\right)$ is metal and $\left(ClO\right)$ parts is a nonmetal.

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence, the given compound sodium hypochlorite $NaClO$, is ionic.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$B{I}_3$

Explanation of Solution

The name of the given compound is boron triiodide. And its molecular formula is $B{I}_3$

In this compound boron $\left(B\right)$ and iodine $\left(I\right)$ are nonmetal.

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound boron triiodide $B{I}_3$, is not an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$Al{\left(Cl{O}_4\right)}_3\to Ionic$

Explanation of Solution

The name of the given compound is aluminum perchlorate. And its molecular formula is $Al{\left(Cl{O}_4\right)}_3$

In this compound aluminum $\left(Al\right)$ and perchlorate $\left(Cl{O}_4\right)$ are nonmetal.

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound aluminum perchlorate $Al{\left(Cl{O}_4\right)}_3$, is not an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$Ca{\left(C{H}_{3}C{O}_2\right)}_2\to Ionic$

Explanation of Solution

The name of the given compound is calcium acetate. And its molecular formula is $Ca{\left(C{H}_{3}C{O}_2\right)}_2$

In this compound Calcium $\left(Ca\right)$ is a metal and acetate $C{H}_{3}C{O}_2$ is a nonmetal.

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound calcium acetate $Ca{\left(C{H}_{3}C{O}_2\right)}_2$, is an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$KMn{O}_4\to Ionic$

Explanation of Solution

The name of the given compound is potassium permanganate. And its molecular formula is $KMn{O}_4$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound potassium permanganate $KMn{O}_4$, is an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

${\left(N{H}_4\right)}_{2}S{O}_3\to Ionic$

Explanation of Solution

The name of the given compound is ammonium sulfite. And its molecular formula is ${\left(N{H}_4\right)}_{2}S{O}_3$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound ammonium sulfite ${\left(N{H}_4\right)}_{2}S{O}_3$, is an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$K{H}_{2}P{O}_4\to Ionic$

Explanation of Solution

The name of the given compound is potassium dihydrogen phosphate. And its molecular formula is $K{H}_{2}P{O}_4$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

The given compound potassium dihydrogen phosphate $K{H}_{2}P{O}_4$, is an ionic compound, potassium and dihydrogen phosphate are metal and non-metal respectively.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

  $S_{2}C{l}_2$

Explanation of Solution

The name of the given compound is disulfur dichloride. And its molecular formula is $S_{2}C{l}_2$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

Sulfur and chlorine are nonmetals so the given compound disulfur dichloride $S_{2}C{l}_2$, is not an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

  $Cl{F}_3$

Explanation of Solution

The name of the given compound is chlorine trifluoride. And its molecular formula is $Cl{F}_3$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

Both the elements in the given compound chlorine trifluoride $Cl{F}_3$ are non-metal so it is not an ionic compound.

Interpretation Introduction

Interpretation: For the given compound, the molecular formula should be determined and should be identified that whether it is ionic or not.

Concept introduction:

• Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.
• Molecular compounds are formed by the combination of nonmetal and nonmetal or metalloid and nonmetal.
• A chemical formula conveys us the number of atoms of each element in a compound. It contains the symbols of the atoms of the elements present in the compound as well as how many are for each element in the form of subscripts.

Answer to Problem 127GQ

$P{F}_3$

Explanation of Solution

The name of the given compound is phosphorus trifluoride. And its molecular formula is $P{F}_3$

Ionic compounds are formed by the combination of metal and nonmetals or metal and polyatomic ions.

Hence,

Both the elements in the given compound phosphorus trifluoride $P{F}_3$ are non-metal so it is not an ionic compound.