(a)
Interpretation: The oxidation number of each atom in
Concept Introduction: An oxidation number of an element is defined as the number assigned to it in any chemical composition representing number of electrons gained or lost by an atom of that element in forming the chemical compound.
(a)
Explanation of Solution
The given substance is
Thus, oxidation number of Ca is +2. Now, general oxidation number of oxygen is -2 thus, oxidation number of Cr is calculated as follows:
Therefore, oxidation number of Cr is +6.
The oxidation number of Ca, Cr and O atom is +2, +6 and -2 respectively.
(b)
Interpretation: The oxidation number of each atom in
Concept Introduction: An oxidation number of an element is defined as the number assigned to it in any chemical composition representing number of electrons gained or lost by an atom of that element in forming the chemical compound.
(b)
Explanation of Solution
The given substance is
Thus, the oxidation number of K is +1. Now, general oxidation number of O is -2 thus, oxidation number of Mn is calculated as follows:
Therefore, oxidation number of Mn is +7.
The oxidation number of K, Mn and O is +1, +7 and -2 respectively.
(c)
Interpretation: The oxidation number of each atom in
Concept Introduction: An oxidation number of an element is defined as the number assigned to it in any chemical composition representing number of electrons gained or lost by an atom of that element in forming the chemical compound.
(c)
Explanation of Solution
The given substance is
This can be represented as
Thus, the oxidation number of Ca is +2. The general oxidation number of O is -2. Thus, the oxidation number of N can be calculated as follows:
Thus, oxidation number of N is +4.
The oxidation number of Ca, N and O is +2, +4 and -2 respectively.
(d)
Interpretation: The oxidation number of each atom in
Concept Introduction: An oxidation number of an element is defined as the number assigned to it in any chemical composition representing number of electrons gained or lost by an atom of that element in forming the chemical compound.
(d)
Explanation of Solution
The given substance is
This can be represented as follows:
Thus, oxidation number of Al is +3. The general oxidation number of O and H is -2 and 1 respectively.
Therefore, the oxidation number of Al, O and H is +3, -2 and +1 respectively.
Chapter 21 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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