请看下面这个小魔术:将盛有水的烧杯放在表面有一层水的薄玻璃片上,将硝酸铵粉末放入烧杯中,用玻璃棒搅拌使其快速溶解,发现烧杯外壁凝结水珠;当把烧杯拿起来的时候,薄玻璃片居然也一块被拿了上来。这是怎么回事呢?仔细观察,原来杯底的水结成了冰,将烧杯与玻璃片粘在了一起。那么,杯底为什么会结冰呢?原来,这个魔术的关键在于硝酸铵。硝酸铵(NH4NO3)是一种常用化肥,无色无味,结晶呈白色或 Take a look at this little trick: Place a beaker of water on a thin glass plate with a layer of water on its surface. Put the ammonium nitrate powder in a beaker and stir it with a glass rod to quickly dissolve it. When the beaker was picked up, a thin piece of glass was actually taken up. This is how the case? Careful observation, the original bottom of the water into ice, the beaker and the glass stick together. So, why the end of the ice cup? Originally, the magic lies in the ammonium nitrate. Ammonium nitrate (NH4NO3) is a common fertilizer, colorless and odorless, white or crystalline