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你知道铁为什么会生锈吗?如果你能做完以下实验,就会对这个问题有更深刻的理解。 找4个带盖、透明的药瓶和4只无锈的铁钉。取少量的药棉花(或泡沫塑料)吸足自来水,放入第一个瓶内,在湿棉花的上面,横放一个铁钉,不盖瓶盖。在第二个瓶内,倒入少量的自来水,放入一个铁钉,使钉子的一半浸入水中,另一半露出水面,并盖紧瓶盖。在第三瓶内倒入开水,放入一个铁钉,使钉子全部浸入水中,盖紧瓶盖。在第四瓶内先放入少量的生石灰(取生石灰时不能直接用手,应使用匙或铁片等工具),再在上面铺一层干燥的药棉花,把铁钉放在棉花上,盖紧瓶盖。将这4个药瓶放
Do you know why iron rusts? If you can do the following experiment, you will have a deeper understanding of this issue. Find 4 covered, transparent medicine bottles and 4 stainless steel nails. Take a small amount of drug cotton (or foam) Suction Tap water, into the first bottle, wet cotton above, put an iron nail horizontally, do not cover the bottle cap. In the second bottle, pour a small amount of running water into an iron nails, so that half of the nail immersed in water, the other half out of the water, and cap tightly. Pour boiling water into the third bottle, put a nails in it, so that all the nails immersed in water, cap tightly. Place a small amount of quicklime in the fourth bottle (you can not use your hand directly when taking lime, use tools such as spoons or iron plates), and then spread a layer of dry medicinal cotton on it. Place the iron nail on the cotton cover Tight cap. Put these 4 medicine bottles