Leclanche cell

Anode.

Oxidation

Reduction

Zinc container

Electrolyte : : Graphite rod in contact with MnO, ammonium chloride and zinc chloride in water

Cathode

Overall rea

Emf of the cell is about 1.5V

Cell emf

Cell reaction

Uses

ondary batter

We have alrea

may be rever

This principl

lerstand the fur

Oxidation at anode

Zn(s)Zn^ 2( (aq)+2e^ -



Reduction at cathode
Anode.

Oxidation

Reduction

Zinc container

Electrolyte : : Graphite rod in contact with MnO, ammonium chloride and zinc chloride in water

Cathode

Overall rea

Emf of the cell is about 1.5V

Cell emf

Cell reaction

Uses

ondary batter

We have alrea

may be rever

This principl

lerstand the fur

Oxidation at anode

Zn(s)Zn^ 2( (aq)+2e^ -
Reduction at cathode
2 NH 4 ^ -(aq) + 2e -> 2N*H_{3}(aq) + H_{2}(g)


The hydrogen gas is oxidised to water by MnO, H_{2}(g) + 2Mn*O_{2}(s) -> M*n_{2}*O_{3}(s) + H_{2}*O(l)

Equation (1) + (2) + (3) gives the overall redox reaction
The hydrogen gas is oxidised to water by MnO, H_{2}(g) + 2Mn*O_{2}(s) -> M*n_{2}*O_{3}(s) + H_{2}*O(l)

Equation (1) + (2) + (3) gives the overall redox reaction