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《义务教育化学课程标准(2011年版)》在关于对学生进行纸笔测验的要求中明确指出,“编制联系实际考查学生能力的试题时,情景要真实,避免出现科学性错误”。在中考复习过程中,学生对2013年广东省湛江市中考化学卷第23题图像所展示的实验情景产生了质疑,于是我组织学生对该题所示情景进行了实验探究,实验结果确实与图像情景不同。现将探究过程简单概括如下,一同商榷。一、题目某兴趣小组用10 g镁条与溶质质量分数为49%的稀硫酸反应,测得产生氢气的质量与稀硫酸的质量关系如附图所示(假设镁条中除表面含有氧化镁外,没有其
The Compulsory Education Chemistry Curriculum Standard (2011 Edition) clearly states in its request for pen and paper tests on students that “When compiling questions that relate to actual examination of students’ ability, the scenarios should be realistic and avoid scientific errors.” During the exam review process, students questioned the experimental scenario shown in the image of Question No. 23 of the ZKJC in 2013 in Guangdong Province, so I organized the students to experimentally explore the scenario shown in the question. The experimental results are in good agreement with the images Different scenarios. The inquiry process is now briefly summarized below, together to discuss. First, the topic of interest group with 10 g magnesium and solute mass fraction of 49% of the dilute sulfuric acid reaction, measured the quality of hydrogen produced and the quality of dilute sulfuric acid as shown in the figure (assuming the magnesium strips in addition to the surface containing magnesium oxide No, no