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三大金属钠、铝和铁是元素化学考查的主要核心之一,它们分别代表特活泼金属、两性金属和变价金属。各具特性的金属通过一定情景的混搭重组,可以全方位考查学生的接受、吸收整合化学信息的能力,分析和解决化学问题的能力,化学实验与探究的能力。类型一:单质间的“混搭”知识依据:钠与水反应2Na+2H_2O=2NaOH+H_2↑,铝与强碱溶液反应2Al+2NaOH+2H_2O=2NaAlO_2+3H_2↑,
The three major metals, sodium and aluminum, are among the major core elements of elemental chemistry, representing particularly lively, amphoteric and variable-valent metals, respectively. The characteristics of the metal through a certain mix of reorganization of the scene, students can fully examine the acceptance, the ability to absorb the integration of chemical information, analysis and resolution of chemical problems, chemical experiments and explore the ability. Type 1: between the simple substance “mashup ” Knowledge base: sodium and water reaction 2Na + 2H_2O = 2NaOH + H_2 ↑, aluminum and alkali solution reaction 2Al +2 NaOH + 2H_2O = 2NaAlO_2 + 3H_2 ↑,