Chapter 5, Problem 52QP

(a)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type is to be determined for the given chemical equation.

Explanation of Solution

The chemical equation that is shown below is balanced because the number of atoms on the left side is equal to the number of atoms on the right side.

This chemical reaction is a combination reaction in which two different chemical compounds combine to form new compounds.

${\text{GaH}}_3\left(s\right)+\text{N}{\left({\text{CH}}_3\right)}_3\stackrel{}{\to }{\left({\text{CH}}_3\right)}_3{\text{NGaH}}_3$

(b)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The skeleton equation for the chemical equation is shown below, where on the left side, the number of atoms is not equal to the number of atoms on the right side.

$\text{Ca}\left(s\right)+{\text{H}}_2\text{O}\left(l\right)\stackrel{}{\to }\text{Ca}{\left(\text{OH}\right)}_{\text{2}}\left(aq\right)+{\text{H}}_{\text{2}}\left(g\right)$

To balance the chemical equation, the coefficient for ${\text{H}}_2\text{O}\left(aq\right)$ changes to $2$ . The balanced chemical equation for the given reaction is shown below.

This reaction is a single-displacement reaction because calcium replaces the hydrogen from the water molecule and forms calcium hydroxide.

$\text{Ca}\left(s\right)+2{\text{H}}_2\text{O}\left(l\right)\stackrel{}{\to }\text{Ca}{\left(\text{OH}\right)}_{\text{2}}\left(aq\right)+{\text{H}}_{\text{2}}\left(g\right)\mathrm{......}\left(3\right)$

(c)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The chemical equation that is shown below is balanced because the number of atoms on the left side is equal to the number of atoms on the right side.

This chemical reaction is a single-displacement reaction in which a carbon atom is replaced from its chemical compound by nitrogen.

${\text{N}}_{\text{2}}\left(g\right)+{\text{CaC}}_2\left(s\right)\stackrel{}{\to }\text{C}\left(s\right)\text{+CaNCN}\left(s\right)\mathrm{......}\left(4\right)$

(d)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The skeleton equation for the chemical equation is shown below, where on the left side, the number of atoms is not equal to the number of atoms on the right side.

$\text{N}{2}_{}\left(g\right)+\text{Mg}\left(s\right)\stackrel{}{\to }{\text{Mg}}_3{\text{N}}_2\left(s\right)$

To balance the chemical equation, the coefficient for $\text{Mg}\left(s\right)$ changes to $3$ . The balanced chemical equation for the given reaction is shown in (6) and this reaction is a type of combination reaction.

$\text{N}{2}_{}\left(g\right)+3\text{Mg}\left(s\right)\stackrel{}{\to }{\text{Mg}}_3{\text{N}}_2\left(s\right)$

(e)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The chemical equation that is shown below is balanced because the number of atoms on the left side is equal to the number of atoms on the right side.

This chemical reaction is a decomposition reaction in which ammonium chloride decomposes into ammonia and hydrochloric acid.

${\text{NH}}_4\text{Cl}\left(s\right)\stackrel{}{\to }{\text{NH}}_3\left(g\right)+\text{HCl}\left(g\right)$

(f)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type is to be determined for the given chemical equation.

Explanation of Solution

The chemical equation that is shown below is balanced because the number of atoms on the left side is equal to the number of atoms on the right side.

This chemical reaction is a combination reaction in which calcium sulfate is formed when calcium oxide and sulfur trioxide combine.

$\text{CaO}\left(s\right)+{\text{SO}}_3\left(g\right)\stackrel{\text{heat}}{\to }{\text{CaSO}}_4\left(s\right)$

(g)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The chemical equation that is shown below is balanced because the number of atoms on the left side is equal to the number of atoms on the right side.

This chemical reaction is a decomposition reaction in which phosphorus pentachloride is decomposed on heating.

${\text{PCl}}_5\left(g\right)\stackrel{\text{heat}}{\to }{\text{PCl}}_3\left(g\right){\text{+Cl}}_2\left(g\right)$

(h)

Interpretation Introduction

Interpretation:

The balanced chemical equation and the reaction type are to be determined for the given chemical equation.

Explanation of Solution

The skeleton equation for the chemical equation is shown below, where on the left side, the number of atoms is not equal to the number of atoms on the right side.

${\text{Ca}}_3{\text{N}}_2\left(s\right)+{\text{H}}_2\text{O}\left(l\right)\stackrel{\Delta }{\to }\text{Ca}{\left(\text{OH}\right)}_2\left(aq\right)+{\text{NH}}_3\left(g\right)+{\text{H}}_2\text{O}\left(g\right)$

To balance the chemical equation, the coefficients for ${\text{H}}_2\text{O}\left(l\right),\text{Ca}{\left(\text{OH}\right)}_2\left(aq\right),\text{and}{\text{NH}}_3\left(g\right)$ change to $6$ , $3$ , and $2$ , respectively. The balanced chemical equation for the given reaction is shown below. This reaction is a type of decomposition reaction.

${\text{Ca}}_3{\text{N}}_2\left(s\right)+6{\text{H}}_2\text{O}\left(l\right)\stackrel{\Delta }{\to }\text{3Ca}{\left(\text{OH}\right)}_2\left(aq\right)+2{\text{NH}}_3\left(g\right)$