Chapter 11, Problem 37A

(a)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 37A

The balanced complete reaction will be ${\text{2PbO}}_{\text{2}}\text{(s)}\to 2{\text{PbO(s)+O}}_{\text{2}}$

Explanation of Solution

The given chemical reaction is:

  ${\text{PbO}}_{\text{2}}\text{(s)}\to {\text{PbO(s)+O}}_{\text{2}}$

The number of oxygen atoms is 1 on the reactant side and 3 on the product side. By multiplying with 2 as a coefficient of lead oxide in the reactant side and with lead oxide.

The balanced chemical equation will be:

  ${\text{2PbO}}_{\text{2}}\text{(s)}\to 2{\text{PbO(s)+O}}_{\text{2}}$

(b)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 37A

The balanced complete reaction will be ${\text{2Fe(OH)}}_3\text{(s)}\to {\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}{\text{(s)+3H}}_{\text{2}}\text{O(s)}$

Explanation of Solution

The given chemical reaction is:

  ${\text{Fe(OH)}}_3\text{(s)}\to {\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}{\text{(s)+H}}_{\text{2}}\text{O(s)}$

The number of iron atoms is 1 on the reactant side and 2 on the product side. By multiplying with 2 as the coefficient of iron and by 3 with the water molecule, the equation will be balanced.

The balanced chemical equation will be:

  ${\text{2Fe(OH)}}_3\text{(s)}\to {\text{Fe}}_{\text{2}}{\text{O}}_{\text{3}}{\text{(s)+3H}}_{\text{2}}\text{O(s)}$

(c)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 37A

The balanced complete reaction will be ${{\text{(NH}}_{\text{4}}\text{)}}_{\text{2}}{\text{CO}}_{\text{3}}\text{(s)}\to 2{\text{NH}}_{\text{3}}{\text{(s)+H}}_{\text{2}}{\text{O(s)+CO}}_{\text{2}}\text{(s)}$

Explanation of Solution

The given chemical reaction is:

  ${{\text{(NH}}_{\text{4}}\text{)}}_{\text{2}}{\text{CO}}_{\text{3}}\text{(s)}\to {\text{NH}}_{\text{3}}{\text{(s)+H}}_{\text{2}}{\text{O(s)+CO}}_{\text{2}}\text{(s)}$

The number of hydrogen atoms is 6 on the reactant side and 2 on the product side. By multiplying the coefficient of ammonia by 2, the equation will be balanced.

The balanced chemical equation will be:

  ${{\text{(NH}}_{\text{4}}\text{)}}_{\text{2}}{\text{CO}}_{\text{3}}\text{(s)}\to 2{\text{NH}}_{\text{3}}{\text{(s)+H}}_{\text{2}}{\text{O(s)+CO}}_{\text{2}}\text{(s)}$

(d)

Interpretation Introduction

Interpretation: To determine the balance of chemical reactions.

Concept Introduction: The type of chemical reaction in which the count of atoms will be identical on both sides of the reaction is named a balanced chemical reaction.

Answer to Problem 37A

The balanced complete reaction will be ${\text{CaCl}}_{\text{2}}{\text{(aq)+H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{(aq)}\to {\text{CaSO}}_{\text{4}}\text{(s)+2HCl(aq)}$

Explanation of Solution

The given chemical reaction is:

  ${\text{CaCl}}_{\text{2}}{\text{(aq)+H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{(aq)}\to {\text{CaSO}}_{\text{4}}\text{(s)+HCl(aq)}$

The number of chlorine atoms is 2 on the reactant side and 1 on the product side. By multiplying with 2 as a coefficient of HCl, the equation will be balanced.

The balanced chemical equation will be:

  ${\text{CaCl}}_{\text{2}}{\text{(aq)+H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{(aq)}\to {\text{CaSO}}_{\text{4}}\text{(s)+2HCl(aq)}$