
Concept explainers
(a)
Interpretation:
The given equation has to be written complete and balanced
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a
chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants. - The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
- First write the reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Finally obtained values could place it as coefficients of reactants as well as products.
- Loss of electron and loss of Hydrogen in a compound is oxidation - the compound is oxidized. Gain of electron, gain of Oxygen in a compound is reduction - the compound is reduced.
Oxidation reduction and reduction reaction occur simultaneously in same reaction.
To Write: The given equation complete and balanced.
(a)

Answer to Problem 21.116QP
The complete and balanced equation for the given equation is:
Explanation of Solution
Given Equation:
Complete Equation:
A complete equation will have same elements present on both sides of the equation.
The above equation can be completed by writing as follows,
Balancing the equation:
A balanced equation will have same elements and same number of atoms of each side of the reaction.
List the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
2 |
|
3 |
1 |
|
1 |
To balance the above equation, multiply
Again, list the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
2 |
|
2 |
6 |
|
6 |
3 |
|
3 |
The number of atoms on both sides of the reaction are same. Therefore, the above equation is a balanced one.
Hence, the complete and balanced form of the given equation is written as:
The complete and balanced equation of the given equation is written as:
(b)
Interpretation:
The given equation has to be written complete and balanced
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants.
- The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
- First write the reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Finally obtained values could place it as coefficients of reactants as well as products.
- Loss of electron and loss of Hydrogen in a compound is oxidation - the compound is oxidized. Gain of electron, gain of Oxygen in a compound is reduction - the compound is reduced.
- Oxidation reduction and reduction reaction occur simultaneously in same reaction.
To Write: The given equation complete and balanced.
(b)

Answer to Problem 21.116QP
The complete and balanced equation of the given equation is:
Explanation of Solution
Given Equation:
Complete equation:
A complete equation will have same present on both sides of the equation.
The above equation can be completed by writing as follows,
Balancing the equation:
A balanced equation will have same elements and same number of atoms of each side of the reaction.
List the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
10 |
|
7 |
2 |
|
1 |
2 |
|
1 |
1 |
|
1 |
To balance the above equation, multiply
Again, list the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
10 |
|
10 |
2 |
|
2 |
2 |
|
2 |
1 |
|
1 |
The number of atoms on both sides of the reaction are same. Therefore, the above equation is a balanced one.
Hence, the complete and balanced form of the given equation is written as:
The complete and balanced equation of the given equation is written as:
(c)
Interpretation:
The given equation has to be written complete and balanced
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants.
- The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
- First write the reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Finally obtained values could place it as coefficients of reactants as well as products.
- Loss of electron and loss of Hydrogen in a compound is oxidation - the compound is oxidized. Gain of electron, gain of Oxygen in a compound is reduction - the compound is reduced.
- Oxidation reduction and reduction reaction occur simultaneously in same reaction.
To Write: The given equation complete and balanced.
(c)

Answer to Problem 21.116QP
The complete and balanced equation for the given equation is:
Explanation of Solution
Given Equation:
Complete Equation:
A complete equation will have same elements present on both sides of the equation.
The above equation can be completed by writing as follows,
Balancing the equation:
A balanced equation will have same elements and same number of atoms of each side of the reaction.
List the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
2 |
|
1 |
13 |
|
7 |
1 |
|
3 |
3 |
|
1 |
1 |
|
2 |
To balance the above equation, multiply
Again, list the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
2 |
|
2 |
18 |
|
18 |
3 |
|
6 |
3 |
|
3 |
6 |
|
6 |
The number of atoms on both sides of the reaction are same. Therefore, the above equation is a balanced one.
Hence, the complete and balanced form of the given equation is written as:
The complete and balanced equation of the given equation is written as:
(d)
Interpretation:
The given equation has to be written complete and balanced
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants.
- The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
- First write the reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Finally obtained values could place it as coefficients of reactants as well as products.
- Loss of electron and loss of Hydrogen in a compound is oxidation - the compound is oxidized. Gain of electron, gain of Oxygen in a compound is reduction - the compound is reduced.
- Oxidation reduction and reduction reaction occur simultaneously in same reaction.
To Write: The given equation complete and balanced.
(d)

Answer to Problem 21.116QP
The complete and balanced equation for the given equation is:
Explanation of Solution
Given Equation:
Complete Equation:
A complete equation will have same elements present on both sides of the equation.
The above equation can be completed by writing as follows,
Balancing the equation:
A balanced equation will have same elements and same number of atoms of each side of the reaction.
List the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
1 |
|
2 |
1 |
|
3 |
Multiply
Again, list the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
2 |
|
2 |
6 |
|
6 |
6 |
|
6 |
The number of atoms on both sides of the reaction are same. Therefore, the above equation is a balanced one.
Hence, the complete and balanced form of the given equation is written as:
The complete and balanced equation of the given equation is written as:
(e)
Interpretation:
The given equation has to be written complete and balanced
Concept Introduction:
Balancing the equation:
- There is a Law for conversion of mass in a chemical reaction i.e., the mass of total amount of the product should be equal to the total mass of the reactants.
- The concept of writing a balanced chemical reaction is depends on conversion of reactants into products.
- First write the reaction from the given information.
- Then count the number of atoms of each element in reactants as well as products.
- Finally obtained values could place it as coefficients of reactants as well as products.
- Loss of electron and loss of Hydrogen in a compound is oxidation - the compound is oxidized. Gain of electron, gain of Oxygen in a compound is reduction - the compound is reduced.
- Oxidation reduction and reduction reaction occur simultaneously in same reaction.
To Write: The given equation complete and balanced.
(e)

Answer to Problem 21.116QP
The complete and balanced equation for the given equation is:
Explanation of Solution
Given Equation:
Complete Equation:
A complete equation will have same elements present on both sides of the equation.
The above equation can be completed by writing as follows,
Balancing the equation:
A balanced equation will have same elements and same number of atoms of each side of the reaction.
List the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
1 |
|
2 |
1 |
|
2 |
Multiply
Again, list the atoms of the equation in a table and check for the equal number of atoms present on either side of the reaction.
Reactant side | Atom | Product side |
1 |
|
1 |
2 |
|
2 |
2 |
|
2 |
The number of atoms on both sides of the reaction are same. Therefore, the above equation is a balanced one.
Hence, the complete and balanced form of the given equation is written as:
The complete and balanced equation of the given equation is written as:
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Chapter 21 Solutions
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