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"So, Qinglong King, you mean that these red bricks can not only be used to build roads, but also be used to build houses that will not collapse for dozens or even hundreds of years?"
certainly! Even if it is hailstones, don't be afraid!
Li Shimin's face was shocked, his eyes were dull, holding the rectangular red brick in both hands, his hands were trembling with excitement.
OK!
This red brick is good!
Emperor Tang University.
Various equations are written on the blackboard.
Lin Xuan was speaking slowly.
Lin Xuan happened to be at school today, so the dean came to invite Lin Xuan to give a lesson to the students.
Lin Xuan was also a little interested when he was free, so he agreed.
Although there is no physical education class, no one has any complaints.
Being able to come to Lin Xuan's chemistry class proved their ability.
It is not an exaggeration to choose one in a thousand.
Others can't even come if they want to.
Walking in the campus, they all held their heads high.
One nostril is raised higher than the other.
Without him, they are the rocket class of Emperor Tang University!
The best of the best!
Although they didn't know what a rocket was, what Lin Xuan said was that it was very powerful.
Rocket Class, sounds awesome!
So far, there are only about forty formal students in the chemistry class.
Selected from more than 3,000 students.
And these more than 3,000 students were selected from more than 100,000 students.
Therefore, Lin Xuan also placed high hopes on them.
Their pay is also high.
Be his student and get two hundred dollars every month.
It is twice that of other students.
The rest of the treatment is also very high, for example, you can enter the laboratory.
The laboratory was built by Lin Xuan to the best of his ability.
There are also various jars and beakers.
If they want to go in, they have to get Lin Xuan's consent.
Like others, they are not eligible to enter at all.
After entering, they must strictly follow the rules of the laboratory.
For the first time, plagiarize the laboratory rules.
Those who commit the second offense will no longer be allowed to enter the laboratory.
Lin Xuan has high demands on them, in order to let them know the dangers of chemical experiments.
Don't be joking.
Fortunately, the effect is still good.
Only Cui Hao, a fool, made a mistake once, and no one else did.
"Oxidation reaction, this is a very common phenomenon."
"To put it simply, iron will rust, which is an oxidation reaction."
"Copper will be oxidized into black copper oxide in humid air, and then copper oxide will continue to react with carbon dioxide in the air to become green basic copper carbonate."
"The principle of silverware is similar."
Cui Hao couldn't help raising his hand and asked: "Professor Lin, what should we do when the copper rusts?"
Lin Xuan replied calmly after hearing the words: "You should remember that I said acid-base neutralization reaction."
"The surface of copper is basic copper carbonate, so in addition to polishing, it can also be solved by chemical equations."
"For example, you can use a cloth soaked in vinegar, and add an appropriate amount of salt to remove it."
"The equation is as follows."
Lin Xuan wrote it in a swish.
"But remember, you can't soak it for a long time, otherwise it will damage the copper itself."
"If you are interested, you can go back and try it yourself."
Lin Xuan smiled.
The students below all suddenly realized, and nodded and recorded it.
It is a common phenomenon in life itself, and it can make them more interested.
Lin Xuan then carefully took out a jar.
"This thing is called concentrated sulfuric acid."
"It's a purified substance. You must remember that when using it for experiments, don't touch it."
"Let me show you what kind of chemical reaction will happen if people touch it."
As one of the three acids and two bases, sulfuric acid has a great effect.
Sooner or later they will come into contact with?
Therefore, Lin Xuan also took it out in advance.
He didn't talk about the specific principles, but first demonstrated its dangers.
It is to let them remember and be careful.
Lin Xuan took out a piece of pork.
Everyone stood up.
Shi Qu even stared straight at the eyes.
What is Professor Lin doing?
I saw Lin Xuan carefully sucked out several drops of concentrated sulfuric acid with a dropper.
Then, it dripped directly on the pork.
The voice of Chi Chi Chi sounded suddenly.
At this moment, everyone's eyes are staring straight.
They saw that the pork was corroded into a black pothole!
It exudes a stench!
Hiss!
Even Cui Hao's face changed, and he quickly backed away in fear.
What the hell? !
Is this some kind of magic horse thing? !
Lin Xuan then said slowly: "If you really meet."
"Never rinse with water directly!"
"Doing so will only increase your burned area. You must first dry it with a cotton cloth and then rinse with water."
"You must keep this in mind!"
All in all, but there will always be people who suffer.
"Teacher, what is the use of this thing?" Shi Qu couldn't help asking.
"Damn! Such a scary thing, what do we learn to do?"
"Is it used to kill people?"
Other students talked a lot. (Remember the site URL: www.hlnovel.com - Didn't finish reading? Add this book to your favoritesI'm a member and bookmarked this chapterCopy the address of this book and recommend it to your friends for pointsChapter error? Click here to report
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