Common Dry Cell Anode reaction Zn(s)-→Zn2+(aq)+2e Cathode reaction 2 NH4*(aq)+2- 2 NH3(g)+ H2(g) Related reactions 2 MnO2(s)+H2( g)-Mn2O s)+H2o(e) Zn2+(aq)+2 NH3(g)+2 C1"(aq)- Zn(NH3)2Cl2(s) Net reactio 2 MnO2(s)+2 NH4C1(s)+Zn(s)-Mn2O3(s)+H2O(e)+Zn(NH3)2Cl2(s) E=+1.5V Positive terminal Zinc shell (anode) Sand Cushion Carbon conductor. >(cathode) NHC ZnCI2 electrolyte paste Porous separator Negative terminal 普通干电池的结构和化学反应普通干电池的结构和化学反应