为了提高教学质量,指导学生开展课外活动,我校化学教研组在高中八○级一班举行了“化学晚会”,使学生在文娱活动中复习、巩固和丰富了基础知识,博得同学和观众的欢迎。 晚会开始,幕启时台面两旁已经放着两块白纸糊好的大牌,这是我们预先在纸上用硫氰化钾溶液和亚铁氰化钾溶液分别写成了无色字画。一位同学走上台用喷雾器首先喷出“晚会 In order to improve the quality of teaching and guide students in extra-curricular activities, the chemistry teaching and research section of our school held a “chemical evening” in class one class of high school class 80, which allowed students to review, consolidate, and enrich basic knowledge in cultural and recreational activities, and won praise from classmates and audiences. . At the beginning of the party, there were already two big white paper pastes on both sides of the tabletop during the opening of the curtain. This was written on the paper with colorless pictures of potassium thiocyanate solution and potassium ferrocyanide solution. A classmate goes to the stage and sprays with a sprayer