化学实验是学好化学的基础,实验室经常需要用到各种实验药品。中考化学中,以实验药品为背景的探究题不仅能考查考生综合探究能力与实验基本技能,还能考查考生对物质的组成、鉴别及性质的掌握程度。因此,中考化学常常出现与化学实验药品有关的探究题,现针对这类问题,分两种题型梳理其解题思路,供同学们学习。题型一化学实验药品是否变质的探究常见化学实验药品,如盐酸、氢氧化钠溶液、氢氧化钙溶液等,若没有封存好,容易发生物理变化或化学变化而使药品变质。有些物质具有挥发 Chemistry experiment is to learn chemistry, laboratory often need to use a variety of experimental drugs. In the senior high school entrance exam chemistry, the test questions based on the experimental drugs can not only examine the examinee’s ability of comprehensive inquiry and the basic skills of the experiment, but also examine the examinee’s composing, distinguishing and mastery degree of the substance. Therefore, the senior high school entrance examination chemistry often appear with the inquiry questions related to chemical experimental drugs, is aimed at such issues, divided into two kinds of questions to sort out their problem-solving ideas for students to learn. A type of chemical test whether the deterioration of the chemical drugs common chemical test drugs, such as hydrochloric acid, sodium hydroxide solution, calcium hydroxide solution, if not sealed, prone to physical or chemical changes that make the drug deterioration. Some substances have volatility