Chapter 8, Problem 8.117QP

Write a balanced equation for the preparation of (a) molecular oxygen, (b) ammonia, (c) carbon dioxide, (d) molecular hydrogen, (e) calcium oxide. Indicate the physical state of the reactants and products in each equation.

Interpretation Introduction

Interpretation:

The balanced equation for the preparation of molecular oxygen has to be given indicating the physical state of the reactants and products.

Concept Introduction:

• Chemical equation is the representation of a chemical reaction, in which the reactants and products of the reactions are represented left and right side of an arrow respectively by using their respective chemical formulas.
• Reactant of a chemical reaction is the substrate compounds or the compounds which undergo a chemical reaction.
• Product of a chemical reaction is the produced compounds or the compounds formed after a chemical reaction.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.

Answer to Problem 8.117QP

The balanced equation for the preparation of molecular oxygen can be given as:

$2KCl{O}_3{}_{\left(s\right)}\underset{}{\to }2{\text{KCl}}_{\left(s\right)}+3{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Explanation of Solution

Molecular oxygen is prepared from $KCl{O}_3$. Reaction for the preparation of molecular oxygen can be given as:

$KCl{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{KCl}}_{\left(s\right)}+{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Here, the number of each element on both sides is made equal by giving the coefficient 2 for the reactant $KCl{O}_3$ and product $\text{KCl}$. Also the coefficient 3 is given to ${\text{O}}_{\text{2}}$ so that the number of elements on both sides becomes equal.

Therefore,

The balanced equation for the preparation of molecular oxygen can be given as:

$2KCl{O}_3{}_{\left(s\right)}\underset{}{\to }2{\text{KCl}}_{\left(s\right)}+3{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Interpretation Introduction

Interpretation:

The balanced equation for the preparation of ammonia has to be given indicating the physical state of the reactants and products.

Concept Introduction:

• Chemical equation is the representation of a chemical reaction, in which the reactants and products of the reactions are represented left and right side of an arrow respectively by using their respective chemical formulas.
• Reactant of a chemical reaction is the substrate compounds or the compounds which undergo a chemical reaction.
• Product of a chemical reaction is the produced compounds or the compounds formed after a chemical reaction.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.

Answer to Problem 8.117QP

The balanced equation for the preparation of ammonia can be given as:

$N_2{}_{\left(s\right)}+3{\text{H}}_{\text{2}}{}_{\left(g\right)}\underset{}{\to }2{\text{NH}}_3{}_{\left(g\right)}$

Explanation of Solution

Ammonia is prepared by the reaction between nitrogen and hydrogen. Reaction for the preparation of ammonia can be given as:

$N_2{}_{\left(s\right)}+{\text{H}}_{\text{2}}{}_{\left(g\right)}\underset{}{\to }{\text{NH}}_3{}_{\left(g\right)}$

Here, the number of each element on both sides is made equal by giving the coefficient 2 for the product ${\text{NH}}_3$ and coefficient 3 for the reactant ${\text{H}}_{\text{2}}$.

Therefore,

The balanced equation for the preparation of ammonia can be given as:

$N_2{}_{\left(s\right)}+3{\text{H}}_{\text{2}}{}_{\left(g\right)}\underset{}{\to }2{\text{NH}}_3{}_{\left(g\right)}$

Interpretation Introduction

Interpretation:

The balanced equation for the preparation of carbon dioxide has to be given indicating the physical state of the reactants and products.

Concept Introduction:

• Chemical equation is the representation of a chemical reaction, in which the reactants and products of the reactions are represented left and right side of an arrow respectively by using their respective chemical formulas.
• Reactant of a chemical reaction is the substrate compounds or the compounds which undergo a chemical reaction.
• Product of a chemical reaction is the produced compounds or the compounds formed after a chemical reaction.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.

Answer to Problem 8.117QP

The balanced equation for the preparation of carbon dioxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Explanation of Solution

Carbon dioxide is prepared from $CaC{O}_3$. Reaction for the preparation of carbon dioxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Here, the number of each element on both sides is equal.

Therefore,

The balanced equation for the preparation of carbon dioxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Interpretation Introduction

Interpretation:

The balanced equation for the preparation of molecular hydrogen has to be given indicating the physical state of the reactants and products.

Concept Introduction:

• Chemical equation is the representation of a chemical reaction, in which the reactants and products of the reactions are represented left and right side of an arrow respectively by using their respective chemical formulas.
• Reactant of a chemical reaction is the substrate compounds or the compounds which undergo a chemical reaction.
• Product of a chemical reaction is the produced compounds or the compounds formed after a chemical reaction.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.

Answer to Problem 8.117QP

The balanced equation for the preparation of molecular hydrogen can be given as:

$Z{n}_{\left(s\right)}+H_{2}S{O}_{4\left(aq\right)}\underset{}{\to }{\text{ZnSO}}_{4\left(aq\right)}+H_{\text{2}}{}_{\left(g\right)}$

Explanation of Solution

Molecular hydrogen is prepared by the reaction between $Zn$ and $H_{2}S{O}_4$. Reaction for the preparation of molecular hydrogen can be given as:

$Z{n}_{\left(s\right)}+H_{2}S{O}_{4\left(aq\right)}\underset{}{\to }{\text{ZnSO}}_{4\left(aq\right)}+H_{\text{2}}{}_{\left(g\right)}$

Here, the number of each element on both sides is equal.

Therefore,

The balanced equation for the preparation of molecular hydrogen can be given as:

$Z{n}_{\left(s\right)}+H_{2}S{O}_{4\left(aq\right)}\underset{}{\to }{\text{ZnSO}}_{4\left(aq\right)}+H_{\text{2}}{}_{\left(g\right)}$

Interpretation Introduction

Interpretation:

The balanced equation for the preparation of calcium oxide has to be given indicating the physical state of the reactants and products.

Concept Introduction:

• Chemical equation is the representation of a chemical reaction, in which the reactants and products of the reactions are represented left and right side of an arrow respectively by using their respective chemical formulas.
• Reactant of a chemical reaction is the substrate compounds or the compounds which undergo a chemical reaction.
• Product of a chemical reaction is the produced compounds or the compounds formed after a chemical reaction.
• Balanced chemical equation of a reaction is written according to law of conservation of mass.

Answer to Problem 8.117QP

The balanced equation for the preparation of calcium oxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Explanation of Solution

Calcium oxide is prepared from $CaC{O}_3$. Reaction for the preparation of calcium oxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$

Here, the number of each element on both sides is equal.

Therefore,

The balanced equation for the preparation of calcium oxide can be given as:

$CaC{O}_3{}_{\left(s\right)}\underset{}{\to }{\text{CaO}}_{\left(s\right)}+C{\text{O}}_{\text{2}}{}_{\left(g\right)}$