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Social ScienceIn a battery, the following oxidation-reduction reactions are taking place: Mn2O3 + ZnO → 2MnO2 + Zn What is being formed at the anode?a. Znb. ZnO c. Mn2O3d. 2MnO2
In a battery, the following oxidation-reduction reactions are taking place:
Mn2O3 + ZnO → 2MnO2 + Zn
What is being formed at the anode?
Expert Answer
Redox reactions include oxidation and reduction reactions occuring simultaneously.
Reduction is said to occur when a chemical species gains electrons. This indicated by decrease in oxidation number.
Oxidation takes place when a chemical species loses electrons. This indicated by increase in oxidation number.
In an electrochemical cell, Reduction occurs at cathode while oxidation at anode.
In given reaction, the oxidation states of various species are
Mn2O3, oxidation state of Mn = +3, of O = -2
ZnO, oxidation state of Zn = +2, of O = -2
In Products,
MnO2, oxidation state of Mn = +4, of O = -2
Zn, oxidation state of Zn = 0
So, clearly, oxidation state of Mn has increased from +3 to +4, that is Mn2O3 has undergone oxidation
Oxidation number of Zinc has decreased from +2 to 0, ZnO has undergone reduction.
As the oxidation occurs at anode, so, the product formed at anode is t...
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Chemistry
Redox Reactions
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