Chemical reaction of zinc manganese battery

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Chemical reaction of zinc manganese battery

Chemical reaction of zinc manganese battery

The following is the reaction of alkaline zinc manganese dry battery.

The positive electrode is the cathode reaction:

MnO2+H2O+e-→MnOOH+OH-

Mnooh has a certain solubility in alkaline solution

MnOOH+H2O+OH-→Mn(OH)4-

Mn(OH)4-+e-→Mn(OH)42-

The negative electrode is anodic reaction: [2]

Zn+2OH-→Zn(OH)2+2e-

Zn(OH)2+2OH-→Zn(OH)42-

The total battery reaction is:

Zn+MnO2+2H2O+4OH-→Mn(OH)42-+Zn(OH)42-

Acid zinc manganese dry cell reaction:

The negative electrode is zinc, which is oxidized to divalent zinc ions:

Zn-2e-=Zn2+

The positive electrode is a carbon rod, and the ammonium radical is reduced

2NH4++2e-=2NH3↑+ H2 ↑

The generated ammonia and hydrogen are absorbed by Zn2 + and MnO2 respectively

4NH3+Zn2+=Zn(NH3)42+,H2+2MnO2=2MnOOH

The total battery reaction is:

4MnO2+2Zn+4NH4+ =4MnOOH+Zn(NH3)42++Zn2+

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Chemical reaction of zinc manganese battery_Zinc manganese battery