PPT: Redox Reaction

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Oxidation-Reduction Reactions
Oxidation-reduction reactions are also called redox reactions.
All redox reactions involve the transfer of electrons from one atom to another.
Spontaneous redox reactions are generally exothermic, and we can use their released
energy as a source of energy for other applications.
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Oxidation-Reduction Reactions
Oxidation-reduction reactions are also called redox reactions.
All redox reactions involve the transfer of electrons from one atom to another.
Spontaneous redox reactions are generally exothermic, and we can use their released
energy as a source of energy for other applications.
Development of Oxidation and Reduction Reaction Concept
Reaction of reduction oxidation based on releasing (lossing) and gaining of oxygen
Oxidation Reaction
Oxidation reaction is a reaction of gaining (capturing) of oxygen by a substance
Example:
CH 4(g) + 2O 2(g) ? CO 2(g) + 2H 2O(g)
P 4(s) + 5O 2(g) ? P 2O 5(g)
Reduction reaction
Reduction reaction is a reaction of releasing (losing) of oxygen from a oxide
compound
Example:
CuO(s) + H 2(g) ? Cu(s) + H 2O(g)
Fe 2O 3(s) + 3CO(g) ? 2Fe(s) + 3CO 2(g)
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Oxidation-Reduction Reactions
Oxidation-reduction reactions are also called redox reactions.
All redox reactions involve the transfer of electrons from one atom to another.
Spontaneous redox reactions are generally exothermic, and we can use their released
energy as a source of energy for other applications.
Development of Oxidation and Reduction Reaction Concept
Reaction of reduction oxidation based on releasing (lossing) and gaining of oxygen
Oxidation Reaction
Oxidation reaction is a reaction of gaining (capturing) of oxygen by a substance
Example:
CH 4(g) + 2O 2(g) ? CO 2(g) + 2H 2O(g)
P 4(s) + 5O 2(g) ? P 2O 5(g)
Reduction reaction
Reduction reaction is a reaction of releasing (losing) of oxygen from a oxide
compound
Example:
CuO(s) + H 2(g) ? Cu(s) + H 2O(g)
Fe 2O 3(s) + 3CO(g) ? 2Fe(s) + 3CO 2(g)
What do you mean by oxidation and reduction?
Oxidation can be defined as addition of oxygen/electronegative element to a substance or
removal of hydrogen/ electropositive element from a substance.
Reduction can be defined as removal of oxygen/electronegative element from a substance
or addition of hydrogen/ electropositive element to a substance.
Page 5


Oxidation-Reduction Reactions
Oxidation-reduction reactions are also called redox reactions.
All redox reactions involve the transfer of electrons from one atom to another.
Spontaneous redox reactions are generally exothermic, and we can use their released
energy as a source of energy for other applications.
Development of Oxidation and Reduction Reaction Concept
Reaction of reduction oxidation based on releasing (lossing) and gaining of oxygen
Oxidation Reaction
Oxidation reaction is a reaction of gaining (capturing) of oxygen by a substance
Example:
CH 4(g) + 2O 2(g) ? CO 2(g) + 2H 2O(g)
P 4(s) + 5O 2(g) ? P 2O 5(g)
Reduction reaction
Reduction reaction is a reaction of releasing (losing) of oxygen from a oxide
compound
Example:
CuO(s) + H 2(g) ? Cu(s) + H 2O(g)
Fe 2O 3(s) + 3CO(g) ? 2Fe(s) + 3CO 2(g)
What do you mean by oxidation and reduction?
Oxidation can be defined as addition of oxygen/electronegative element to a substance or
removal of hydrogen/ electropositive element from a substance.
Reduction can be defined as removal of oxygen/electronegative element from a substance
or addition of hydrogen/ electropositive element to a substance.
Oxidation and Reduction Another Definition
In order to convert a free element into an ion, the atoms must gain or lose electrons of
course, if one atom loses electrons, another must accept them reactions where electrons
are transferred from one atom to another are redox reactions atoms that lose electrons are
being oxidized, atoms that gain electrons are being reduced