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电化学涉及两种能量转化,分别是将化学能转化为电能的原电池和将电能转化为化学能的电解池。原电池和电解池电极发生的都是氧化还原反应,因此电极反应的书写也要遵循氧化还原反应的书写原则,即电子守恒、电荷守恒、质量守恒、元素守恒等,此外还应该遵循加和性原则和共存性原则。加和性原则是指两电极反应相加,消去电子后得到电池总反应式,利用此原则总反应减去已知电极反应式可以得到另一电极反应式。共存性原则是指,碱性溶液中不能出现酸性物质;同样,酸性溶液中不能出现碱性物质。根据此原则,物质得失
Electrochemistry involves two kinds of energy conversion, namely the original battery that converts chemical energy into electric energy and the electrolytic cell that converts electric energy into chemical energy. The original cell and electrolytic cell electrode are redox reactions occur, so the writing of the electrode reaction should follow the redox reaction writing principle, that is, conservation of electricity, conservation of charge, conservation of mass, elemental conservation, in addition should also follow the addition Principles and principles of coexistence. Additivity principle refers to the sum of the two electrodes added to eliminate the electrons to get the total battery reaction, the use of the principle of total reaction minus the known electrode reaction can get another electrode reaction formula. The principle of coexistence means that no acidic substances can be found in the alkaline solution; in the same way, alkaline substances can not be present in the acidic solution. According to this principle, material gains and losses