Cutting over the end of the Ming Dynasty: a dog-leg knife at the beginning

Chapter 421 Chemistry Lessons

The two brothers were almost wrapped up in the flow of people, their feet did not touch the ground, and they came to Nanyang Technical School involuntarily. The flow of people came to the school auditorium...... Hundreds of years in advance, I passed the addiction of squeezing the train home during the Spring Festival travel.

The auditorium can accommodate thousands of people. It is specially used to organize various literary evenings, award ceremonies and academic debate conferences. It has always been one of the busiest places in the entire school. There is an extremely fierce academic debate almost every day, and there are many debates. The hands are divided into several factions and the faces are red, just listening to it has benefited a lot.Now this auditorium is full of seats, and it is so crowded that people who come from behind can't find a seat at all.Everyone knows that behind Nanyang's rapid development, a science plays an extremely important role, that is chemistry.However, no one knows what chemistry is, or they only know a little bit about it. Now, the most unreliable chemistry teacher in history finally thought of giving lessons to everyone. Can you not come and listen?

As a result, the entire originally spacious auditorium was suddenly crowded like sardine cans.Fang Yizhi looked at the snow-white walls and the chandelier on the ceiling, and sighed secretly: "It's really luxurious!"

Just muttering, Dangdangdang!The bell rang, and Yang Menglong walked in with a lot of messy guys in his arms. There was a burst of applause in the auditorium, and more than 2000 teachers, students, and spectators all stood up and bowed to him.He also bowed to everyone with a smile, and said, "Okay, everyone, please sit down. I am very glad that everyone has come to my class."

Fang Yizhi saw that this guy was younger than himself, with a beaming baby face, and was surprised: "He is the commander-in-chief of the Heluo New Army. He was the leader who severely injured the slave chieftain Hongtai in Dalinghe in World War I, and wiped out the rebels in Denglai in World War II." Yang Menglong? Can’t you!?” Many people also have such doubts, this is really unbelievable, no matter how you look at it, Yang Menglong doesn’t look like someone who has made such a big career!However, the teachers and students of Nanyang Technical School, including dozens of missionaries from Europe, sat upright, concentrating their attention and not squinting, so they did not dare to make a sound.

Yang Menglong put alcohol lamps, test tubes, thermometers, sulfuric acid, etc., on the podium one by one, cleared his throat, rubbed his hands and said, "Well... I asked for this course of chemistry. It’s included in the curriculum and I am a chemistry teacher myself. It’s just that I’ve been so busy these two years that I couldn’t find time to teach you a class. It makes everyone laugh. Fortunately, I’m free during this time, so I can study hard. I have given you two lectures, as long as you are interested, you can come and listen. Of course, if you can make you have a strong interest in chemistry, it would be great...Let’s gossip, let’s start the class. First of all , we have to figure out a question before class: what is chemistry." Picking up the chalk, he wrote the line "what is chemistry" on the blackboard. I have a strong interest in chalk and blackboard-writing with this thing is much more convenient than using a brush.

"What is chemistry?" Yang Menglong asked, "Who can tell me what is chemistry?"

A 13-year-old child raised his hand and replied: "I know, the teacher added concentrated sulfuric acid to alcohol, then heated it to evaporate it, and finally got ether. This is chemistry!"

Yang Menglong said: "Yes, this is indeed chemistry, but you missed the point. Can anyone give a more accurate answer?"

An Ning raised her hand and stood up——this surprised the two gentlemen again. A little girl, a little girl, also ran over to class?The little girl's voice was crisp and sweet: "I know! Dip a purple flower in hydrochloric acid and it will turn red, and immerse it in lye and it will turn blue. This is chemistry!"

Everyone was in an uproar, can the color of a flower change back and forth?It's amazing.An Ning looked at them proudly, and said, "My brother has performed all these for me!"

Yang Menglong smiled and asked her to sit down, and said, "You didn't get the point. Well, let me show you what chemistry is." Pointing to the chandelier on the ceiling, he said, "This lamp is called a biogas lamp. , made of transparent glass, see that pipe? This pipe is connected to the school's septic tank..."

Everyone looked at the exquisite chandelier, and then thought about the septic tank, and they couldn't help but lose their appetite... Is this bastard able to connect these two completely opposite things together?

Yang Menglong continued: "Why connect the pipe to the septic tank? The reason is very simple... light it!"

Someone turned on the switch on the ventilation pipe, and another moved a ladder to climb to the ceiling, and pressed one of the brackets of the chandelier, only to hear a bang, and a blue-white spray came out from the glass cover of the chandelier. flames!When everyone witnessed this spectacle, they couldn't help exclaiming, there was no firewood, how could it be...

The most miraculous thing is that the flame has never been extinguished, and it is getting hotter and hotter.Inside the chandelier was a net made of wire, which was heated by the flames, burned red, and soon reached an incandescent state, emitting a strong light, illuminating the dimly lit auditorium like daylight due to the weather.This miracle caused a sensation in the entire auditorium, and even the entire campus was in a commotion. This is simply a miracle!

Yang Menglong said: "This is chemistry!"

A Taoist shouted impatiently: "General, tell us how this is done!"

Yang Menglong said: "It's very simple. The ventilation pipe draws up the methane in the septic tank and burns it in the lampshade... Everyone still doesn't know what the use of methane is? To put it bluntly, it is excrement, vegetation, and even corpses. A kind of combustible chemical gas generated when it rots, and every septic tank will produce a lot of this gas!" He said proudly: "Didn't expect it? Just change the environment a little, and the same thing will create Completely different substances! Now everyone understands what chemistry is? To put it bluntly, it is a science that changes substances! For example, our most common fire, which is a very common chemical phenomenon, has long been It’s no surprise, but..." First, he lit the alcohol lamp, and then picked up a book and put it on top.Everyone stared wide-eyed without blinking, only to see that the flames became paler and paler, and finally gradually extinguished.Yang Menglong took the book away, the flames flickered for a bit, then sprang up, burning so hot!Yang Menglong said: "This is the most common oxidation phenomenon in chemistry. Combustibles and oxygen meet high temperature and then burn. Both are indispensable. Without combustibles, oxygen cannot burn, and without oxygen, combustibles cannot burn either. , I believe that people who burn fire and cook have a deep understanding."

"This is an extremely profound and important science. It can benefit the common people. For example..." Throw a small piece of phosphate rock into sulfuric acid, and white bubbles will appear from the phosphate rock, which will quickly decompose and become It is a very familiar thing, "Phosphate rock and sulfuric acid are mixed in proportion to make wet-process phosphate fertilizer, which makes the land more fertile, the crops are harvested, and the common people have no worries about food and clothing."

Then he added ether to a small cup of green grass juice, and then heated it on an alcohol lamp: "This is the juice of wormwood. It is well known that fresh wormwood juice can treat malaria. In wormwood Add ether to the juice and then heat it, and the final extracted thing is called artemisinin, which can treat falciparum malaria... Do not doubt it, this is definitely a panacea for treating falciparum malaria. Some pharmaceutical companies have already conducted research according to the method I mentioned, I believe At most one year, everyone will see artemisinin on the market.”

"However, chemistry can also take the lives of countless people and make people miserable. For example, the gunpowder invented by the alchemists in the Tang Dynasty has already become an extremely important weapon, and it has taken the lives of countless people. If you want to prepare a powerful Explosives, chemistry is the foundation, without this foundation, everything is out of the question, and powerful explosives, you all know what it means..."

This bastard is rare and serious, eloquent and eloquent, and he does a few small experiments from time to time to prove his point of view, such as changing the color of a flower with hydrochloric acid and lye, for example, putting a ball of absorbent cotton Immersed in nitric acid, and then approached the alcohol lamp to artificially create a small explosion... Anyway, he has a way to make everyone startled and dumbfounded.This class is an eye-opener for everyone. I know that adding vinegar to oil can make the oil look like boiling, but it is almost like warm water. I know that there is something called litmus solution. Use it to draw on white paper, and then use acid Or as soon as the lye is soaked, the ghosts and ghosts on the painting will come out... Some small experiments become more and more familiar to everyone. After listening to Yang Menglong's explanation, they finally couldn't help yelling: Damn, isn't this a trick often used by charlatans? It's called chemistry, it's so hard to deceive me!

The direct consequence of this class is that many charlatans simply cannot survive in Nanyang...

Yang Menglong is quite satisfied with the effect of this class. It can be seen that there are still many people who are interested in chemistry, from children aged 60 to [-] years old, they all listened very seriously.That's right, everyone listen carefully. In the future, someone will do the hard and dirty work like developing chemical fertilizers and researching explosives. How can we let him go to battle every time!While he was vigorously lecturing, his eyeballs rolled around, scanning the audience, calculating how many chemists could be exploited by him...

(End of this chapter)