论文部分内容阅读
化学计算是化学教学中重要的一环,在计算题教学中如何启发学生积极思维,帮助学生很好地分析和理解题意,并培养他们的解题兴趣呢?我感到应给到好处地运用“图示”、提倡“一题多解”。一、运用图示对有一些计算题,我们在帮助学生审题过程中,可以边讲解边画示意图,将关键之处讲课讲透,告诉学生为什么这么想,从而逐步使学生掌握一定的思考和分析问题的方法。例一、将质量为100克的铁片插入硫酸铜溶液中,过一会儿取出,经洗涤干燥后称重,质量是102克,求溶解掉的铁和析出的铜各是几克?
Chemistry calculation is an important part of chemistry teaching. How to inspire students' positive thinking in calculation teaching so as to help students to analyze and understand the questions well and to cultivate their interest in solving problems? I feel that we should give good use “Pictorial”, advocating “a problem and more solutions.” First, the use of pictorial There are some computational questions, we help students in the exam process, we can explain while drawing diagrams, the key to lectures tell, to tell students why think so that students gradually master some of the thinking and analysis The problem's method. Example 1, the quality of 100 grams of iron into the cupric sulfate solution, after a while removed, washed and weighed, the mass is 102 grams, to find out the dissolution of iron and precipitation of copper is a few grams?