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一、鱼我在选择《酸、碱、盐的化学性质(一)》为本节课的探究主题时,就是想让学生们对酸、碱、盐的化学性质产生交叉性的认识,并且在设计探究主题的过程中都是以解决生活中的实际问题为切入点。例如,利用酸、碱、盐的化学性质鉴别黄金(铜锌合金)、除去铁钉上的铁锈,在实验室选择一种药品除水垢、解释利用熟石灰与硫酸铜配制农药波尔多液原理,并找到用铁桶配制波尔多液失效的原因这5个问题的设置就复习了
First, the fish I choose “the chemical properties of acid, alkali, salt (a)” as the theme of this lesson to explore, is to let students on the chemical nature of acid, alkali, salt cross-cutting awareness, and The process of designing the inquiry theme all takes the solution of the actual problems in life as the breakthrough point. For example, the use of acid, alkali, salt chemical identification of gold (copper-zinc alloy), remove the rust on the nails in the laboratory to select a scale removal of drugs, explain the use of hydrated lime and copper sulfate prepared pesticide Bordeaux mixture principle and found The reasons for the failure of the preparation of Bordeaux mixture with irons The review of these five questions is reviewed