一、不外加试剂型 不用其他试剂进行物质鉴别,一般可按照 以下两种方法解答: (1)根据物质的特殊物理性质(如颜色、 气味、溶解性等),首先鉴别出一种或几种物 质,然后以此为试剂去鉴别其余物质. (2)根据各物质间相互混合时所发生反应 的特有现象,首先鉴别出一种物质,然后再依次 鉴别其他物质. First, do not add reagents without other reagents for material identification, generally can be answered in accordance with the following two methods: (1) According to the specific physical properties of the material (such as color, smell, solubility, etc.), first identify one or more Substances, and then use this as a reagent to identify the rest of the substances. (2) According to the peculiar phenomenon of reactions occurring when the substances are mixed with each other, first identify a substance, and then identify other substances in turn.