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高一第一次做化学试验,内容是观察浓硫酸特性。老师别出心裁,要寄宿生们带热水瓶来,说到时要派大用场。上课了,新新旧旧的水瓶沿墙根一溜排开。老师让每一小组派一个人上去拿,话音刚落,心急的家伙们一涌而上,眨眼挑剩下一只,看上去最衰老的一只。老师亲自把它交到有意拉在最后一个的我手里,笑眯眯说:“其实这个做试验效果最好了。大家知道,我们今天就要看硫酸遇碱的化学反应,瓶胆壁上多多少少都结着一层碱性物质。哪只使用最久,碱性就越强,化学反应就越明显!”
The first high school chemistry test, the content is to observe the characteristics of concentrated sulfuric acid. The teacher was ingenious and asked the boarders to come with hot water bottles. In class, the new old and new water bottles lined up along the wall roots. The teacher asked each group to send a person up and get it. The voice just fell, the eager guys rushed in, blinked at the left, and looked the oldest one. The teacher personally handed it over to me, who deliberately pulled it in the last one, and smiled and said: “In fact, this is the best way to do the experiment. We all know that today we will look at the chemical reaction of alkali in sulphuric acid. There is a layer of alkaline material on the bottom, whichever is the longest, the stronger the alkalinity, the more obvious the chemical reaction!”