突破电极反应式的书写

Breakthrough in the Writing of Electrode Reaction Formulas

原电池反应或电解池反应的本质都是氧化还原反应,因此无论是原电池还是电解池的电极反应都要遵循氧化还原反应的规律,特别是得失电子总数与化合价降低或升高的总值相等。原电池反应或电解池反应本质上又都是离子反应,电极反应式通常情况下也是以类似离子方程式的形式出现,因此电极反应式也要遵循离子方程式的电荷守恒和原子守恒。灵活运用这些守恒规律就能突破高考难点中电极反应式的书写。

The essence of original battery reaction or electrolytic cell reaction is both oxidation-reduction reaction, so both of them have to follow the role of oxidation-reduction reaction, especially that the electronic total gains and losses and the total value of gross valence increased or decreased are equal. The essence of original battery reaction or electrolytic cell reaction is also ionic reaction,and electrode reaction formulas also appear in the forms similar to ionic formulas, so electrode reaction formulas also have to follow the charge conservation and atomic conservation of ionic reaction formulas. To flexibly use these rules of conservation can help students break through the writing of electrode reaction formulas as a difficult point of college entrance examination.