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