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事实表明,简单应用金属活动顺序表来判断反应能否发生和推测反应的产物,是片面的。由于反应类型复杂,影响因素繁多,在金属和盐溶液之间的反应不仅有置换反应,还有其他反应及影响,如水解、络合反应、氧化还原反应。本文拟结合上述知识来讨论一些表面看来不符合金属活动性顺序规律的化学反应。金属活动性顺序表:K、Na、Ca、Mg、Al、Mn、Zn、Cr、Fe、金属活动性减弱,原子失电子能Ni、Sn、Ph、(H)Cu、Hg、Ag、Pt、Au力减弱,阳离子得电子能力增大表中金属元素的活动性由强至弱是渐变的,但大致又可分成五类:(1)K、Ca、Na等元素,常温时就能和水、空气迅速反应,称为极活泼金属;
The facts show that the simple application of the metal activity sequence table to judge whether the reaction can occur and speculate the product of the reaction is one-sided. Due to the complex reaction types and numerous factors, the reaction between the metal and the salt solution not only has a displacement reaction but also other reactions and effects such as hydrolysis, complexation reaction, and redox reaction. This article intends to combine the above knowledge to discuss some chemical reactions that do not seem to conform to the order of metal activity. Metal activity sequence table: K, Na, Ca, Mg, Al, Mn, Zn, Cr, Fe, metal activity weakened, atomic electron loss energy Ni, Sn, Ph, (H) Cu, Hg, Ag, Pt, The weakening of the Au force and the increase of the electron capacity of the cations The activity of the metal elements in the table is gradually changed from strong to weak, but it can be divided roughly into five categories: (1) Elements such as K, Ca, and Na can be mixed with water at room temperature. The rapid reaction of air is called extremely active metal;