有关高中化学的简单制作或模型或实验

2025-03-17 00:39:49
推荐回答(1个)
回答1:

有关高中化学的简单制作或模型或实验
1.自制简易净水器
取一个空塑料饮料瓶,剪去底部,瓶口用带导管的单孔胶塞塞紧,将瓶子倒置,瓶内由下往上依次分层放置洗净的蓬松棉,纱布,活性炭等物质,就能得到一简易净水器。
如图。
2.烧不断的棉线
在一杯热水中不断地加入食盐,并不断搅拌,直到食盐不再溶解为止。取一根20cm~30cm的棉线,在一端缚上一个回形针,然后将棉线浸没在浓盐水中数分钟,取出棉线吊起来晾干。把晾干的棉线再次浸入浓盐水中,取出晾干,重复多次。
将这条特制棉线的一头扎在铁丝上,让缚有回形针的那端悬在下面。如果用燃着的火柴去点棉线的下端,就会看到火焰慢慢地向上燃烧,一直到铁丝后熄灭,棉线会烧成焦黑却没有断,回形针还挂在那里。因为特制棉线中充满了食盐晶体存在的缘故。在点燃棉线时,注意保持铁丝的稳定,防止因抖动而使棉线断开。如用明矾代替食盐,将棉线换成一块棉布,做这个的效果也很好,棉布燃烧过后也保持原样不断裂。

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