Zeng Qing obtained iron and converted it into copper, which means that soluble copper compounds react with iron to obtain elemental copper. This is a chemical reaction, that is, a displacement reaction. Iron reacts with copper sulfate to produce copper ferrous sulfate, and copper adheres to the surface of iron. Zeng Qing is a copper sulfate solution, blue-green.
Zeng Qing's story of iron turning into copper
Zeng Qing turned iron into copper. He mentioned this sentence, and many people will definitely think of the replacement reaction in junior high school chemistry textbooks. This seemingly modern principle of scientific chemistry was actually discovered by Liu An, a scientific madman at that time, as early as the Western Han Dynasty.
Although Liu An, the king of Huainan, was born with a silver spoon in his mouth, he was keen on one skill. One of his masterpieces, Huainan Wanbi Shu, recorded some magical reactions in the Western Han Dynasty.
Zeng Qing turned iron into copper, which means a method of smelting copper at that time. Put iron into bile water, and you can get higher value copper as you wish.
Compared with modern chemistry thousands of years later, the cause of ancient chemistry in China started earlier. Although the ancients could not explain some magical chemical principles, they were able to gradually explore a set of laws through their own practice, which had to amaze future generations.
In fact, the development of ancient chemistry not only has a long history, but also has its own merits, blossoming and bearing fruit in many aspects, which has a far-reaching impact on future generations.