化学配伍题型及其解法

• 作 者: 韦鸿福 周艳梅
• 机 构: 广西来宾一中!546100,广西来宾一中!546100
• 出 处: 中学理科参考资料
• 发表日期: 1994年12期
• 关键词: 已知物 跟足 混和物 定物 沉淀值 稀硫酸溶液 硝酸银溶液 混合粉末 役人

在化学试(尤其是化学竞赛)题中常出现这样一类题型:已知A、B混和物(A为已知物、B为待定物)m克,跟足量的C物质反应后生成w克D物质,据此推算出B可能为指定的几种物质(设为B_1、B_2……B_n)中的哪一种。因为解答这类题型需要应用到“配伍”方法,故称之为“配伍题型”。解答这一类题型的一般步骤是,设m克分别为A、B_1、B_2……B_n的质量。

In the chemical test (especially chemical competition) questions often appear such a type of question: Known A, B mixture (A is a known material, B is the object to be determined) m grams, with a sufficient amount of C material to generate w Gram D substance, from which to calculate B may be specified for several substances (set as B_1, B_2 ... B_n) which one. Because answering this type of question needs to be applied to the “compatibility” method, it is called “combination question type”. The general step to answer this type of question is to set the mass of A, B_1, B_2,..., B_n.