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考点1溶液的概念与特征主要知识点有:判断是否为溶液;识别溶质与溶剂;了解溶液的基本特征等。命题形式多是选择题、填充题。例1(2013年北京市中考题)下列物质放入水中,能形成溶液的是()A.面粉B.牛奶C.白糖D.植物油解析溶液是一种或多种物质分散到另一种物质中形成的均一、稳定的混合物。面粉难溶于水,分散到水中不能形成溶液;牛奶难溶于水,分散到水中不能形成溶液;植物油难溶于水分散到水中不能形成溶液;白糖易溶于水,分散到水中可形成溶液。故答案选C。
Test points 1 The concept and characteristics of the solution The main points are: to determine whether the solution; identify solutes and solvents; understand the basic characteristics of the solution. Propositional forms are multiple choice questions, fill questions. Example 1 (Beijing 2013 senior high school entrance examination questions) The following substances into the water, can form a solution is () A. Flour B. Milk C. Sugar D. Vegetable oil analytical solution is one or more substances dispersed into another substance In the formation of a homogeneous, stable mixture. Flour insoluble in water, dispersed in water can not form a solution; milk is poorly soluble in water, dispersed in water can not form a solution; vegetable oil is poorly soluble in water dispersed into water can not form a solution; sugar soluble in water, dispersed in water to form a solution . So the answer is C