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关于不同浓度溶液配制成所需浓度溶液的折算问题,用代数方法进行折算,需要解方程组,因此常用十字交叉法,具体方法在参考资料〔1〕和〔2〕中有介绍。本文所介绍的简易的百分浓度溶液折算器与十字交叉法相比,主要优点是求解速度快,节省时间,不经计算,可以求得结果,构造简单,易制成教具。其构造的原理也很简单,主要是根据相似三角形的性质。
About the conversion of solutions of different concentrations into solutions of the required concentration, the algebraic method is used to calculate the equations. Therefore, cross-cutting methods are commonly used. Specific methods are described in References [1] and [2]. The main advantage of the simple percentage solution calculator compared with the cross method described in this paper is that the solution speed is fast and time is saved. Without calculation, the results can be obtained. The structure is simple and it is easy to make teaching aids. The principle of its construction is also very simple, mainly based on the nature of similar triangles.