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司马光砸缸救人是妇孺皆知的故事,也是逆向思维的光辉典范。在科学中有许多创造发明都是逆向思维的结果.同样,对于有些化学问题,若能运用逆向思维求解,常常会使解题过程简洁明了、快速准确,即使是复杂、繁难的问题也会迎刃而解.一、数据完整型例1 5.1 g Mg、Al合金投入到500 mL 2 mol/L的盐酸中完全溶解.若要得到最大量的沉淀,则加入4 mol/L的烧碱溶液的体积是().
Sima Guang hit the cylinder to save people is a well-known story of women and children, but also a brilliant example of reverse thinking. In science, many inventions are the result of reverse thinking. Similarly, for some chemical problems, using reverse thinking to solve problems often leads to a simple, quick and accurate problem solving process. Even complex and complicated problems can be solved Data Complete Example 1 5.1 g Mg, Al alloy is completely dissolved when it is put into 500 mL 2 mol / L hydrochloric acid To obtain the maximum amount of precipitate, the volume of 4 mol / L caustic soda solution is () .