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假日中,高二(1)班化学小组开展了有关离子鉴定的课外复习活动。实验桌上放了三瓶无色透明的未知溶液,分别编了号。活动的第一个内容是:检验1号未知溶液里是否含有SO_4~(2-)。那不是很容易吗?同学们熟练地操作起来。一会儿,大家异口同声地得出了结论:“含有SO_4~(2-)”女生小组报告了实验过程:“在未知溶液中滴入BaCl_2溶液后,产
During the holiday, the senior 2 (1) class chemistry team conducted extracurricular review activities related to ion identification. Three bottles of colorless and transparent unknown solution were placed on the experiment table and numbered separately. The first part of the activity was to check if SO_4~(2-) is contained in No. 1 unknown solution. Isn’t that easy? The students are skilled in the operation. After a while, everyone came to the conclusion that the ”girls group with SO_4~(2-)“ reported the experimental process:” After the solution of BaCl2 was added to the unknown solution, it was produced.