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纵观近几年中考化学探究题中涉及到有关酸和碱的内容,主要有以下几个方面的题型:类型一、以酸、碱性质展开的探究例:(2006年南昌市)小婧同学做硫在氧气中燃烧的实验前,预先在集气瓶底装有少量水。实验过程中她联想到老师介绍过二氧化硫排放到空气中会形成酸雨,于是想了解燃烧后集气瓶底部残留的“水”是否也呈酸性。她取“水”多
Looking at the content of acid and alkali involved in the chemistry examination questions of the senior high school entrance examination in recent years, there are mainly the following types of questions: Type I. Exploratory examples of the nature of acid and alkali: (Nanchang City, 2006) Before the experiment that the students burned sulphur in oxygen, a small amount of water was pre-filled at the bottom of the gas collection bottle. During the experiment, she thought that the teacher introduced sulphur dioxide into the air to form acid rain, so he wanted to know whether the “water” left at the bottom of the gas cylinder was also acidic. She took “water” more