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化学计算解题虽然没有一成不变的方法模式,但应建立解题的基本思维模式:题示信息+基础知识+逻辑思维.掌握正确的解题方法能简化解题过程,提高解题能力.本文就常用的解题技巧做个简要的归纳.一、差量法差量法是指根据化学反应前后物质的量发生变化,找出“理论差量”.这种差量可以是质量、物质的量、气态物质的体积和压强、反应过程中的热量等.用差量法解题是先把化学方程式中的对应差量(理论差量)跟差量(实际差量)列成比例,然后
Although there is no static method of stoichiometry problem solving, but the basic problem-solving mode of thinking should be established: the problem information + basic knowledge + logical thinking. Master the correct problem-solving method can simplify the problem-solving process and improve the ability to solve problems. Commonly used problem-solving skills to make a brief induction. First, the difference method Difference method refers to changes in the amount of material before and after the chemical reaction to find the “theory of the amount of difference.” This difference can be quality, material The volume and pressure of gaseous substances, the heat in the reaction process, etc. To solve the problem with the difference method, the corresponding difference (theoretical difference) and the difference (actual difference) in the chemical equation are first scaled, then