笔者对比新旧化学考纲,就考纲中调整和变化的内容谈一些认识,并对今年的高考题做一些前瞻。一、平衡常数平衡常数包括化学平衡常数K、电离平衡常数K_a(或K_b)、水的离子积常数K_w、水解平衡常数K_h、难溶物沉淀溶解平衡常数K_(sp)等。在 The author compares the old and new chemical test syllabus, on the syllabus adjustment and changes in the content to talk about some understanding, and this year’s college entrance examination to do some foresight. First, the equilibrium constant Equilibrium constants include chemical equilibrium constant K, ionization equilibrium constant K_a (or K_b), water ion constant K_w, hydrolysis equilibrium constant K_h, insoluble precipitation precipitation equilibrium constant K_ (sp) and so on. in