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在新课改教材化学必修2(人教版)第二章第二节“化学能和电能”中,以铜-锌原电池为例说明原电池的构成及反应原理:原电池由两个半电池组成。引导学生得到原电池正负极的确定:还原性较强的材料失电子向外电路提供电子作负极,氧化性较强的离子从外电路得到电子作正极,电池内部通过离子的定向移动传导电流。通常,对于两个电极都是金属时,我们可以用金属活动性顺序表来对金属进行还原性强弱的判断,以确定
In the new teaching material chemistry compulsory 2 (PEP) Chapter II, Section II “chemical energy and electrical energy ” in the copper-zinc battery as an example to illustrate the structure of the original battery and reaction principle: the original battery from two A half-battery. Lead students to get the original battery positive and negative determination: strong reducing material loss of electrons to the external circuit to provide electrons for the negative, strong oxidizing ion from the outer circuit for electrons as the positive, the battery inside the ion conduction through the targeted conduction current . In general, for metals where both electrodes are metal, we can use metallic activity order tables to determine the reducibility of the metal to determine