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二氧化碳气体能用排水法收集吗?这个问题是许多初中化学教师同行的困惑,也是许多学生爱提的问题。笔者曾上网查找相关资料,同样众说纷纭。戴安邦说过:化学是一门实验科学,学习化学特别需要从实验入手。人教版2012年九年级化学上册第118页提出:二氧化碳能溶于水。在通常状态下,1体积水约能溶解1体积的二氧化碳,增大压强会溶解得更多。二氧化碳与水反应生成碳酸,碳酸很不稳定,容易分解生成二氧化碳和水。查资料得知以下两点:第一,在标准大气压及温度为0℃时,1体积的水中可溶解0.88体积的CO2气体,CO2稍溶于水。第二,高中化学教材这样叙述:炔烃大多数在同
Can carbon dioxide gas be collected by drainage? This problem is the confusion of many middle school chemistry teachers and is also a question of many students’ love. The author has to find relevant information online, the same divergent opinions. Dai Anbang said: Chemistry is an experimental science, learning chemistry in particular need to start from the experiment. PEP 2012 ninth grade chemistry on page 118 proposed: carbon dioxide can dissolve in water. Under normal conditions, 1 volume of water can dissolve about 1 volume of carbon dioxide, and increasing pressure will dissolve more. Carbon dioxide reacts with water to form carbonic acid, which is very unstable and easily decomposed to form carbon dioxide and water. Check the information that the following two points: First, the standard atmospheric pressure and temperature 0 ℃, 1 volume of water soluble 0.88 volume of CO2 gas, CO2 slightly soluble in water. Second, high school chemistry textbook narrative: alkyne most in the same