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知识点1:溶液是一种特殊的混合物有关溶液组成的学习要求达到:理解溶液的基本特征,了解溶液的组成并能判断溶质、溶剂.溶液是由溶质和溶剂组成的一种混合物,溶质可以是一种或多种,溶剂通常是一种,溶质可以是气体、液体或固体,而溶剂通常是液体(随着同学们学习的深入,空气、合金等也可以看作溶液.如新鲜的空气就可以看作是氧气、稀有气体、二氧化碳等分散到氮气中所形成的气体溶液;如生铁可以看成是将碳、硅、磷、锰等分散到铁中所形成的固体溶液.)溶液中各处的颜色、溶质质量分数、密度、化学性质相同,这是溶液的均一性;同时溶液还具有稳定性.
Knowledge point 1: The solution is a special kind of mixture. The learning requirements for the composition of the solution are reached: understand the basic characteristics of the solution, understand the composition of the solution and can judge the solute, solvent. The solution is a mixture of solute and solvent, the solute can be It is one or more, the solvent is usually one, the solute can be gas, liquid or solid, and the solvent is usually liquid (as the students learn, air, alloys, etc. can also be considered as solutions. Such as fresh air It can be seen as a gas solution formed by the dispersion of oxygen, a rare gas, carbon dioxide, etc. into nitrogen; for example, pig iron can be regarded as a solid solution formed by dispersing carbon, silicon, phosphorus, manganese, etc. into iron.) The color, solute mass fraction, density, and chemical properties are the same everywhere, which is the homogeneity of the solution; at the same time, the solution also has stability.