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极值法是化学学习中很重要的一种解题方法,也是中学生必须掌握的一种方法,现举例说明。例1.四位同学同时分析一种由KCl和KBr组成的混合物,他们各取2.00 g样品配成水溶液,加入足量AgNO3溶液后再加入适量稀硝酸,待沉淀完全后过滤,得到干燥的卤化银沉淀的质量如下列四个选项所示,其中数据合理的是()。
The extremum method is a very important solution to the problem of chemistry learning and a method that middle school students must master. Example 1. Four students simultaneously analyzed a mixture composed of KCl and KBr. Each sample of 2.00 g was dubbed as an aqueous solution. A sufficient amount of dilute nitric acid was added to the solution after sufficient AgNO3 solution was added. After the precipitate was completely filtered, a dry halogenated The quality of silver precipitation as shown in the following four options, of which the data is reasonable ().