"This is hydrochloric acid, which is extremely volatile and corrosive, very dangerous but also very useful. It can react with alkalis to produce chloride and water, and it can also react with salts to produce new acids and salts. Hydrochloric acid, sulfuric acid, nitric acid, together with sodium carbonate and sodium hydroxide, are the basis of the entire chemical industry. ”

"If the chemical industry were a huge city, they would be stones and bricks, and nothing could be built without these five raw materials. These days, you have seen some basic chemical experiments, those are all skins, and if you want to understand these things, you have to guard a pile of bottles and cans for months like Senior Brother Gao, and take the trouble to put various substances together according to the basic principles and find out their laws. ”

"It's a very boring but very honorable thing, and every new discovery has the potential to be famous through the ages and named after itself for generations to come, for centuries and millennia to come. Think about it, who remembers the prime minister or general thousands of years ago, and how many can they remember? But after a thousand years, people will have to study chemistry from an early age, and recite the name of the inventor every day, isn't it amazing? ”

The hydrochloric acid is put into a large glass jar by a special person, and then covered with a wooden barrel, which must be stuffed with straw for protection. A group of children wearing masks stood dozens of steps away, listening intently to Hong Tao's vernacular.

Don't underestimate those masks, they are all pure hair, and they will cost dozens of dollars in the future generations. But Hong Tao didn't wear it, he felt that his physique, which had been soaked in various additives, pesticides, and fertilizers in later generations, not to mention a small chemical exhaust gas, might be resistant even if he encountered nuclear dust immediately.

The main reason is still the mouth, he can tolerate the pungent smell and poisonous gases, but he definitely can't tolerate something stuck in his mouth to make him unable to speak, so what's the point of being alive.

This vernacular is not nonsense, it is looking for the seedlings hidden in the vast number of living beings for the ancients who may become the great chemists of the future. Some interests are innate, but some interests are nurture. If you can fool out a few children who are interested in a career in chemistry, it would be great!

It's a pity that people are not as good as heaven, and the good is so great that it almost becomes a great evil. The next day, Hong Tao tasted the side effects of fooling others, and he was so scared that he didn't dare to squeak for a long time.

Zhao was poisoned, and the violent cough was accompanied by dyspnea and rapid heartbeat, plus his cardiovascular problems were a bit of a problem, and he almost died.

This child may be the seedling that Hong Tao is looking for who is naturally interested in chemistry, or is he a thief who is bold enough to steal a small bottle of concentrated hydrochloric acid with two brothers in a chemistry laboratory class and bring it back to the dormitory, intending to verify whether what his uncle said is correct. As a result, the hydrochloric acid reacted with the stone, and Zhao was poisoned after inhaling the reaction gas.

"What is this, where did it come from?" Hong Tao felt that the matter must not be as simple as Zhao Kui and Zhao Tong brothers, and they were not in the dormitory at that time, so they escaped. If the three princes are poisoned by themselves, if they don't rebel, they will have to rebel, and it's hard to argue.

"Yes, I picked it up from the yard, there are pine lines on it, and the sixth brother said that it is called Songhua Stone." Zhao Yu's little face turned white with fright, if the sixth brother died, he would not be able to escape the blame, and the stone for the test was provided by him.

"Tall, let him get over right away!" Hong Tao took the stone in Zhao Wei's hand, looked forward and then looked left and right, pinched and pinched and smelled, and licked it with his tongue, almost taking a bite and tasting it.

"Where did this thing come from?" Gao Yu rolled really fast, he was originally waiting in the yard.

"Yes, it was dug up by digging feldspar, I don't think it looks like a stone, it's more like a mine, and there is a reflection of iron in it. But the texture is so soft and not very similar, so I left some plans to find an opportunity to ask the officials for advice, but I didn't want to cause trouble......"

Gao Yu felt very guilty, the basic laboratory was managed by him, and he was responsible for losing experimental raw materials and hurting people. When he saw the stone in Hong Tao's hand, he felt even more guilty, this thing he put in the corner of the yard.

"You dug it yourself?" After listening to Gao Yu's confession, Hong Tao calmed down a lot, as if he was more interested in stones than the prince's illness.

"Yes...... Wang Yi's injury ...... "Gao Yu felt that Lord Shuai Si was a little off-topic, and wanted to remind him."

"He's fine, he just needs to be raised for a few days, and if there is anything in the future, he has to figure out the reason first, and then he knows what kind of poison he has been in. Let's go, take the official to the place where you dug the feldspar, and bring a shovel and pickaxe. ”

Zhao Maid is indeed not in danger of life, and can already eat and drink, but the respiratory tract is more uncomfortable. Hong Tao must determine what kind of poison he has been poisoned to determine whether there is really no danger and sequelae, and this work must start with the test materials used.

Hydrochloric acid has already seen it myself, it is ordinary concentrated hydrochloric acid, nothing special, then the problem should be on this stone. It is indeed a bit like a metal mineral as Gao Yu said, but the hardness is very low, the nails can be carved, and the color is relatively light, so it should not be an ordinary metal ore. There is speculation about what it is, but it will have to be seen on the ground.

The place where Gao Yu dug feldspar is not far from the city, at the foot of the mountain to the south. There is feldspar here, but it is not pure, mixed with some black metal ore and this soft stone with pine patterns.

"How does this thing react with hydrochloric acid?" At this time, Hong Tao has basically confirmed what kind of ore this is, it is indeed a metal ore, but he is not a chemistry major, he has not seen the reaction between it and concentrated hydrochloric acid, and he does not know the result. It's not hard to find out, just take two stones and try it back.

"Damn, it's this thing, hurry up, bring a bucket of well water!"

As soon as a small piece of ore and a few drops of concentrated hydrochloric acid came into contact, Hong Tao understood everything, and then became interested, planning to personally do an experiment for Wang Wu and them to see. Thanks to Zhao Maid, I discovered a very important chemical gas, chlorine!

The scientific name of pine stone is soft manganese ore, which is a relatively common ore, the composition is manganese dioxide, which is one of the raw materials for refining manganese metal, and is also the main raw material for industrial waste gas desulfurization.

It reacts with concentrated hydrochloric acid to produce chlorine gas, which is a highly toxic gas. Zhao Maid has a big fortune telling and little inhalation, otherwise it will not be saved at all with the current medical conditions.

At the same time, chlorine is also a very useful chemical raw material, too high-end use Hong Tao is not clear, but there is an application closely related to daily life, that is, water purification.

The reaction of chlorine gas with water produces a substance called hypochlorous acid, which is so oxidizing that it cannot be preserved by ordinary means. This strong oxidant destroys the proteases of bacteria and viruses, directly killing most bacteria, viruses and microorganisms in the water.

In later generations, tap water and swimming pools were disinfected with chlorine, as long as the amount is controlled, it is relatively safe, and the cost is very low, suitable for large-scale use. The harm is that this should be divided into time periods. In ancient times, it was a good tool for disinfection, sterilization, and insect control.

If there are lice and fleas in the room, it is difficult to completely remove them in the usual way, and even if a few are missed, they will continue to grow, and soon reproduce a large number of offspring and continue to bite.

But with chlorine, it's easier to get rid of it. First close the doors and windows of the room, then pour in chlorine for a few hours, and then open it to the wind for a few hours. After the chlorine gas volatilizes clean, hehehe, not to mention the jumping lice, even the rats, cockroaches and ants are gone.

It can also be used as a means of sterilizing surgical instruments, or to disinfect items used by people with infectious diseases, and even as a crop insecticide. Especially drinking water. With its addition, many diseases and pests and diseases can be avoided for humans.

In addition to this, chlorine is also a good bleaching agent. After having it, the Liangzhou Woolen Mill is blessed. In the past, no matter how good the woolen textiles were, they could not be snow-white, and the dyeing was not very transparent. Now, as long as you pay attention to the dosage and anti-poison, not only woolen textiles can be snow-white, but also other textiles and paper can do this.

Of course, there are many dangers to overcome when using chlorine, such as not being able to come into contact with hydrogen, which can explode in sunlight. There are also transportation and storage issues, which need to be solved before they can be applied on a large scale.

However, these are application problems, and it is much easier to discover them and know their properties well. With the help of time and the growing number of people who are willing to join the chemistry industry, we will definitely be able to overcome these difficulties.