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“对应”记忆法,是帮助学生记忆的有效方法之一。如在讲授电解水这部分教学内容时,学生很容易记住“水在直流电作用下会分解生成氢气和氧气”。但对氧气在哪一极析出,氢气在哪一极析出,却记不真切;对两极产生的氢气和氧气的体积比为2:1也难记住。为帮助学生记住这些知识,如阳极析出的是氧气,我介绍了同音词对应记忆法:根据阳(yáng)氧(yǎng)对应为阳极—氧气。有的学生还联想到生活用语“痒痒”。由此学生不仅轻松地记住了“阳极析出氧气”,同时还记住了“阴极析的是氢气”。
The “corresponding” memory method is one of the effective ways to help students remember. If teaching electrolyzed water in this part of the teaching content, it is easy for students to remember that “water will decompose into hydrogen and oxygen under the action of direct current”. However, it is difficult to memorize the exact ratio of hydrogen to oxygen produced at the two poles, whichever pole of oxygen is precipitated, and where hydrogen is deposited. In order to help students remember this knowledge, if oxygen is evolved from the anode, I have introduced the homophone to memory: according to Yang (oxygen) corresponds to anodic-oxygen. Some students also think of the language “itching.” As a result, students not only easily remembered the “anode oxygen evolution”, but also remembered that “the cathode is hydrogen gas”.