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原电池的正、负极的确定及电极反应式的书写是原电池知识学习中的一个重点和难点,也是历年高考考查的热点,如何正确判断电极名称、准确书写原电池的电极反应式,是全面掌握原电池知识点的必要条件,为了更好的复习掌握此方面知识点,现将其归纳列举如下:一、原电池正、负极的判断1.依两极电极材料的相对活泼性来确定一般情况下:相对活泼性较强(针对电解质溶液而言)的金属为负极,一般负极材料要和电解质溶液发生氧化还原反应,相对活泼性较差的金属或导电的非金属等为正极。注意:通常两种不同金属在电解
The determination of the positive and negative electrodes of the primary battery and the writing of the electrode reaction are a hot topic in the knowledge-based learning of the primary battery. It is also a hot spot for examining the college entrance examination over the years. How to accurately determine the electrode name and accurately write the electrode reaction of the primary battery is a comprehensive To master the necessary conditions of the original battery knowledge point, in order to better review and master knowledge in this regard, are summarized below: First, the positive and negative battery judge 1 according to the relative activity of bipolar electrode material to determine the general situation Under: Relatively more lively (for the electrolyte solution in terms of) the metal is negative, the general anode material and the electrolyte solution should be redox reaction, relatively less active metal or conductive non-metallic and other positive. Note: Usually two different metals are electrolyzed