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复分解反应发生的条件及应用,特别是有关物质或离子在溶液中的共存、物质的鉴别、物质的分离与提纯、物质的转化、物质的推断、实验方案的设计与评价等,一直是中考命题的热点,主要考查学生对复分解反应概念的理解及反应能否发生的判断,常见题型为选择题、填空题和实验探究题.题型一直接判断型例1(2012年台州)硫酸的工业用途广泛,如生产染料、农药、化学纤维、塑料等.实验室也可以用稀硫酸来制取H2S气
The conditions and applications of metathesis reactions, especially the coexistence of related substances or ions in solution, the identification of substances, the separation and purification of substances, the conversion of substances, the inference of substances, the design and evaluation of experimental protocols, etc., have always been the test of the test Of the hot spots, mainly to examine the students understanding of the concept of metathesis reaction and the reaction can judge, common questions for the multiple-choice questions, fill in the blank and the experimental questions. Question 1 has been directly judge the type 1 (2012 Taizhou) sulfuric acid industry Wide range of uses, such as the production of dyes, pesticides, chemical fiber, plastics, etc. Laboratory can also be used to produce H2S gas dilute sulfuric acid