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解答时不需运用计算的问题称为性质问题。例如:当硷溶液与硫酸铜溶液混合时,析出蓝色沉淀此现象是物理现象还是化学现象?学生利用关于物理现象与化学现象的区别本质及关于化学反应的标志等已知知识,不难解答此问题。学生的知识常带有形式的特征,因此,与已学知识相类似的事实,他们常不能理解.化学性质问题在防止知识的形式主义化,使知识具体化以及知识的加深与巩固方面,起着巨大作用。它在形成辩证唯物主义世界观方面,也有很大的意义,因为在某些现象的观察(生动的感觉的结果)及其叙述与解释(抽象的思维)后,学生在解答性质问题时转向已知知识的运用。
The problem of calculating without solution is called a matter of quality. For example: When the alkaline solution mixed with copper sulfate solution, the precipitation of blue precipitation This phenomenon is a physical phenomenon or a chemical phenomenon? Students use the physical and chemical phenomena on the difference between the essence and the chemical reaction of the known knowledge, not difficult to answer This problem. Students often have the characteristics of a form of knowledge, therefore, they are often not comprehensible to facts similar to what they have learned.As for the chemical nature, in preventing the formalization of knowledge, making the knowledge concrete and deepening and consolidating the knowledge, A huge role. It is also significant in forming a dialectical worldview of materialism, because after some phenomena are observed (the result of vivid sensations) and their narration and explanation (abstract thinking), students turn to the known Use of knowledge.