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在2013年4月底宜昌市组织的九年级化学调研考试中有这样一道原创题:表1是“部分酸、碱和盐的溶解性表(室温)”中的一部分,据此判断下列有关①处物质的说法不正确的是()。A.①处物质的名称是氢氧化铁B.①处物质属于碱C.①处物质不溶于水D.①处物质的化学式是Fe(OH)_2此题取材于九年级教材下册“部分酸、碱和盐的溶解性表(室温)”中的一部分。“溶解性表”是学生学习复分解反应的基础,也是后续学习化学的重要工具。该题的考查意图是检查学生是否能真正看懂此表,了解教学对常见物质的溶解性这一工具性知识是否落实。该题属于容易题目,估计难度值为0.85,然而阅卷的统计结果如表2所示。
At the end of April 2013 Yichang City, organized by the ninth grade chemical research exam has such a original question: Table 1 is “part of the acid, alkali and salt solubility table (room temperature) ” part of the judgment based on the following ① at the material is not correct is (). A. ① at the name of the substance is iron hydroxide B. ① at the material belonging to the base C. ① Department of matter is not soluble in water D. ① Department of chemical formula is Fe (OH) _2 This topic is based on the ninth grade textbook “ Part of acid, base and salt solubility tables (room temperature) ”. “Dissolved Table ” is the basis for students to learn about metathesis reactions, but also an important tool for further learning chemistry. The purpose of this test is to check if the student can really understand the table and know if the instrumental knowledge of teaching about the solubility of common substances is implemented. The question is easy title, the estimated difficulty value is 0.85, however, the statistical results of the marking are shown in Table 2.