论文部分内容阅读
元素化合物知识是中学化学中基本概念和基本理论的具体体现,如果对物质的性质和化学基本理论理解不透彻,势必导致解题出错。虽然学生在解题时所犯的错误五花八门,但其中也存在一些共性的问题。下面列举一些典型实例进行详细分析,希望学生引以为戒。1.受思维定式干扰例1.有下列化合物:①Na_2O_2、②Fe(OH)_3、③FeCl_2、④CuS、⑤CuI_2、⑥NaHCO_3,其中不可能通过化合反应制得的是()
The knowledge of elemental compounds is a concrete manifestation of the basic concepts and basic theories of chemistry in middle schools. If the understanding of the nature of matter and the basic chemical theory is not thorough enough, it will inevitably lead to mistakes in solving problems. Although students make a wide variety of mistakes in solving problems, there are also some common problems. Here are some typical examples for a detailed analysis, I hope students take warnings. 1. By thinking of the form of interference Example 1. The following compounds: ① Na_2O_2, ② Fe (OH) _3, ③ FeCl_2, ④ CuS, ⑤ CuI_2, ⑥ NaHCO_3, which can not be obtained by chemical reaction ()