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一、教学目标 1.建立溶液的概念。根据溶液特征能区别出真溶液。根据溶液的名称能指明溶质,溶剂和溶液的组成成分。 2.建立溶解度概念,能以它为核心来说明:饱和与不饱和溶液;溶解与结晶;物质溶解难易的区分;浓、稀溶液与饱和、不饱和的关系。 3.建立浓度概念,会使用质量百分数表示溶液的浓度。 4.会找出溶质和溶剂的量求溶解度。
First, teaching goals 1. Establish the concept of solution. According to the solution characteristics can distinguish the true solution. The composition of the solute, solvent and solution can be specified according to the name of the solution. 2. To establish the concept of solubility, we can use it as the core to explain: saturated and unsaturated solutions; dissolution and crystallization; the difficulty of the dissolution of substances; the relationship between concentrated and dilute solutions and saturation and unsaturation. 3. Establish the concept of concentration and use the mass percentage to express the concentration of the solution. 4. The amount of solute and solvent will be found to determine the solubility.