Demon Development System

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After all the students formed a loop, Hu Zengwu also opened the slide and began the experimental teaching.

His style is obviously different from that of Zhou Yi, and it is more rigorous. The meticulous standards described in each step will not pass the place that Zhou Yi takes for granted (just what he thinks).

But at the same time, there is also the taste of studying at a glance, it is unlikely to have any impact, it can be said that it is not much different from self-study.

This is certainly not his fault, after all, such a wonderful person as Zhou Chenghuan is too rare.

At this moment, Hu Zengwu's rhythm is naturally a bit sleepy for Li Zheng, but he still insists on listening hard, mainly to correct some of the unhealthy winds learned by Shi Yang.

Just like the "neutral taxiing" when learning to drive, the speed is medium, seeing a red light in the distance, and sliding to neutral to use inertia, this is a fuel-saving and labor-saving operation, but in the driving license test, this operation is Points deducted.

An old driver like Shi Yang is naturally full of this kind of rogue, and he should not learn it all. Maybe an operation is safe in the environment at that time, but it is not easy to say another condition.

As an apprentice of Shimen, Li Zheng can be regarded as a half-road, and it is not useless to come back to re-understand the rigor of his studies.

After an hour of hard work, the basic experiment routines were finished.

After a 10-minute break, Hu Zengwu asked Shen Yiyun to issue the test questions and materials.

One roll for each person, plus a small bag of industrial salt mud, and the remaining reagents are already on the shared laboratory table before class.

As soon as you come up to play real questions, most of the students are a little flustered. Even the theoretical gangsters have had very few experimental opportunities before.

A small flat head in the front row glanced at the roll and said, "Teacher Hu, you take us to do it first, right?"

On the stage, Hu Zengwu closed the notebook and shook his head with a blank face.

"This experiment, the knowledge and skills needed, have all been taught to you in the previous lesson."

"One and a half hours of experiment time."

"I will group according to the results. I will take my small experiment class tomorrow if I meet the standard. If I don't meet the standard, Yiyun will continue to provide you with the foundation until it meets the standard."

"Everyone is top-notch, and it must be clear that we are selecting top-notch-pointers to communicate with the top-notch nationwide on behalf of Jijing. Therefore, the cauldron is not suitable for the current situation."

"Finally, I emphasize again that all the knowledge and skills you need have been taught to you."

"If the ability is outstanding enough, even if this is your first experiment, you will be able to make achievements."

After all, he raised his arm and looked at his watch: "The experiment started, it is now three o'clock, and the report is due before four thirty."

Rumble...

The classmates dare to speak out but dare not scold.

Cooperating with this old man, he is only going to teach him good players?

The rest is left to this half-hanging school sister?

Even more terrifying is-

What did you teach in the last lesson?

Some people are being forced, some are angry.

Some people have already gone to the public laboratory table to grab reagents.

Li Zheng and Wu Shu were the first to bear the brunt, respectively grabbing the reagents needed for the first step.

"I'll take 50ml of sulfuric acid, enough for both of us." Li Zheng snatched a 25% sulfuric acid bottle.

Wu Shu picked up the vial containing the light yellow liquid: "Okay, is my 40ml sodium hypochlorite enough?"

"25 is enough."

While the others were still looking at the paper, the two had poured salt mud into the beaker.

Half a minute later, the rest of the talents rushed to the test bench one after another, fighting for the reagents they had taken.

Hu Zengwu still had no expression. He took a chair and sat down, calling Shen Yiyun next to him: "Li Zheng's reaction is almost normal. What is Wu Su's theory?"

Shen Yiyun quickly turned over the material: "Ninth, the best result of Renda University this year."

"Sun Leyang taught?"

When Shen Yiyun heard the name, his voice gradually softened, and he dared not say more: "This...I don't know."

"Since it's Benevolence, it must be Sun Leyang." Hu Zengwu smiled disdainfully. "Sun Leyang, a person of this level, is not good enough, and the scientific research circle can't be mixed up, so he has to squeeze into the education circle and enter the education circle. He is not honest. Teaching and educating people, specializing in research competitions, only knows to do some tricks and tricks, teach students to take shortcuts to solve problems, and finally teach a bunch of problem-solving machines and send them to me."

"Yes... yes..." Shen Yiyun hears Hu Zengwu spraying Sun Leyang almost every month, and has formed a habitual response.

According to Senior Brother, it seems to be related to Hu Zengwu's youth emotional problems...

As for the specifics, no one knows.

After all, this is the absolute dead point of Hu Zengwu.

"It seems that Sun Leyang has pressed the right question again this year." After Hu Zengwu had scolded enough, he shook his head again. "Yi Yunna, I didn't mean to embarrass his students, that is to say, an objective fact, don't go out and talk nonsense. "

"Don't say... don't say..." Shen Yiyun didn't dare to talk more and took out Shi Yang's materials. "You have a lot of effort. Look at Shi Yang's previous results in advance. His father just sent it."

"Huh." Hu Zengwu took the material and turned over and said, "How is Shi Yang's situation?"

"Still in hospital, President Zhou means that even if he can't come, try to keep him a quota."

"Well... Don't mess up this matter, it's Zhou Yi's thing to give the quota. How many points should I give here." Hu Zengwu put down the materials and whispered, "This time, so many parents and the system People looked at it, and Shi Yang didn’t come, so he sent him to the national ruling. Who is responsible for the trouble?"

"Yes, I can be sure of Shi Yang's experimental level. He is really very, very good, at least as good as Li Zheng."

"I know, I believe you." Hu Zengwu raised his hand, "Don't say anything about this."

Shen Yiyun frowned slightly. If the two heavyweight teachers strongly recommended Shi Yang, the Chemical Society would have reason to accept their opinions and recruit Shi Yang into the country, so she wanted to fight for it again, so she gritted her teeth: "Mr. Hu, I can issue a report on Shi Yang’s assessment. You can make changes and then jointly with Dean Zhou and submit it to the Chemical Society. It should help Shi Yang to fight for it."

"Absolutely not." Hu Zengwu glared at Shen Yiyun. "Are you afraid not to cause trouble to yourself? Which student in this room does not have a family background? It's really entangled. When I found it, it was your report. Zhou Yi left him okay. Now, how do you explain? We are only responsible for our own part, don’t cause trouble."

"Okay..." Shen Yiyun refused to bow his head, and dared not say a word.

For Shi Yang's affairs, she has already said a lot of good things in front of Zhou Yi.

But now it seems that Zhou Yi has intentions, but he has never seen Shi Yang, and he is not too determined.

Hu Zengwu kept his mind and forbid himself to speak for Shi Yang again.

This development, this chemical metamorphosis, threatened to go to Prague to perform the preparation of special substances to the world... I am afraid that it will break the halberd and anorectal hospital.

After all, Shen Yiyun spoke lightly and couldn't say anything. He only kept up with Hu Zengwu's pace and toured the experiment together.

On Li Zheng's side, the effort to heat the solvent has already clarified the experimental ideas in his mind.

Extract magnesium sulfate heptahydrate from the salt mud.

Rather than extracting what is needed, it is better to extract unnecessary impurities by suction.

After all, in industrial salt sludge, in addition to the target element magnesium, there are various chemical components such as calcium, iron, aluminum, and manganese.

In order to extract "magnesium", the salt sludge is first hydrolyzed to make a solution, and then the undesirable things are chlorinated and hydrolyzed to hydroxides, so that they are precipitated as solids, and then suction filtered.

Finally, the remaining magnesium is crystallized to make magnesium sulfate heptahydrate.

There are many processes, but the principle is simple.

The core is only one point-PH value.

In this experiment, each substance to be filtered off will precipitate as a solid at different pH values.

As long as the theory passes, and the PH value of each substance is completely precipitated, the final result will always be quite the same.

However, if you are a newcomer to the experiment, the probability is that you will only look at the scrolling steps. According to this book, you will not think about each step of the reaction and adjust the PH value carefully.

Figured this out, Li Zheng couldn't help but turn to Wu Shu and worry about her.

Wu Shu's progress here is a little slower, and his movements are not so skilled, it seems that there is not much to make up for the experiment.

Li Zheng squeezed his throat, and said softly: "The PH of the fully precipitated iron hydroxide is 3.2, aluminum hydroxide..."

Suddenly Wu Shu raised his hand and did not look at Li Zheng, said indifferently: "I can do it myself."

"But you have just been deducted points." Li Zheng said in a deep voice, "Hu Zengwu gave a short time, there is no room for mistakes."

"I know, then I can do it myself." Wu Shu lowered his head, carefully stirring the salt mud slurry, and his face was colder than before. "If so, I will be angry."

Seeing her look, Li Zheng finally nodded and turned his attention back to his experiment.

This guy also kept saying that Ou Xingzhuo values ​​self-esteem too much.

It's really fifty steps and a hundred steps.

At the same time, Hu Zengwu led Shen Yiyun, patrolling back and forth, telling Shen Yiyun from time to time, let her record in the book, it should be deducting operating points.

Other than that, there is no guidance.

Basically it is clear that the apron is in the small class.

What Li Zheng didn't quite understand was that since it was a screening, a comprehensive investigation should be conducted, but Hu Zengwu only stood behind Wu Shu for a long time and recorded a lot, as if waiting for her to make more mistakes.

Instead, Li Zheng only glanced here, passing by.

Under the inspection of the two examiners, it was obviously a simulation experiment, but it was like a final exam.

Because the experiment has many steps and is very dense, the quieter it gets from the back.

In the meantime, some people keep making mistakes and ask for some salt sludge to start all over again. The high probability is because of the deviation of PH value.

In the formal exam, 20 points will be deducted for re-doing the experiment, and then considering the time, the preparation question can almost declare 0 points.

This tense atmosphere lasted for almost an hour.

What broke the atmosphere was a "beep" voice.

Many people are familiar with the experimental equipment, this sound has only one source-

Electronic balance.

Hearing this sound means that someone has made a product.

Follow the sound.

Li Zheng is placing a watch glass with a mass of white crystals on the balance, looking at the numbers to fill out the experiment report.

The same voice sounded in most people's hearts.

This is again?

When will you come, Mom's cobalt god?

On Li Zheng's side, when filling out the experiment report, Shen Yiyun and Hu Zengwu also came over.

Hu Zengwu glanced at the electronic screen and picked up Li Zheng's final report.

【Theoretical output: 3.41g】

【Actual output: 2.78g】

【Actual yield: 81.5%】

"Yes." Hu Zengwu returned the report blankly to Li Zheng. "Take a good thing and go to the next door to do the content determination. Everything you need is ready."

"Congratulations~" Shen Yiyun raised an eyebrow quietly.

Students around me heard this and realized it.

Li Zheng forced him into a small class.

Hu Zengwu's small experimental class must have been carefully cultivated and went to the national gold...

If you don't go in... then you can only let the unreliable school sister counsel, whatever you think it's fate.

No, I have to hurry up.

Just when everyone wants to fight.

Still in the old place, a female voice followed.

Wu Shu walked to the table with a watch glass and blew a bang: "Student, have you used up the balance?"

Li Zheng didn't expect Wu Shu to be so fast. Looking at the white crystals in her hand, she was immediately delighted and quickly removed her product: "Nothing, Allhail."

Wu Shu smiled, ignoring Hu Zengwu, and put his product on the balance.

Balance display-

[2.65g]

Seeing the result, Wu Shu exhaled relaxedly, and the result was recorded.

Li Zheng was not surprised, "You are doing such a complicated experiment for the first time?"

"That's right." Wu Shu quickly filled out the report and turned back to Shen Yiyun.

Shen Yiyun took the report, and because it was definitely up to standard, she just glanced at it perfunctoryly, and asked, "Mr. Hu... Is she OK?"

"Wait a second." Hu Zengwu didn't look at Wu Shu, only raised his hand. "Just now there are a lot of deductions for the experimental operation, go back first."

Li Zheng glared and deducted many points? Or spend a lot of time staring at her and deduct points alone?

Upon seeing this, Wu Shu quickly pulled Li Zheng and said, "Yes, go and wait for me over there."

Seeing that the situation was wrong, Shen Yiyun also stepped forward to push Li Zheng: "In the end there will be a total score, and Wu has a great chance."

"Yiyun." Hu Zengwu frowned, "Is it stand for me again?"

"..."

Hu Zengwu then turned to Li Zheng: "Take a good product and quickly prepare."

"..." Li Zheng glanced at Hu Zengwu, and his heart was horizontal, silently picked up his product, "Wu Shu can't go to the small class at this level, then I won't go, the big class is the big class, it doesn't matter."

After all, he returned to his seat with the product, and instantly took out the latest volume "Ghost Destroyer" specially provided by Zhang Xiaoke from the school bag, and began to relax in situ.

It wasn't until Li Zheng started to turn the comics that Hu Zengwu reflected what happened.

What did you take my class for? ?

I still have time to teach you a middle school student?

Hu Zengwu's face twitched sharply and shouted directly: "What do you mean?"

People in the whole laboratory were startled, and they pulled their necks to watch the show.

What's wrong!

How did Li Zheng read the comics?

Seeing that the situation was wrong, Shen Yiyun persuaded: "Ms. Hu, you are busy first, I will tell him that it is probably the young people who are righteous..."

"What kind of loyalty do you speak? Am I not going to let this girl go?" Hu Zengwu looked irritated, Li Zheng staring at the comic waved his arms and said angrily, "This is not a loyalty, it is a hero, how old are you, what are you? relationship?"

In the sudden outcry, Shen Yiyun shivered, not even persuading.

It was Wu Shu, who generously picked up his product and went to Hu Zengwu.

"The teacher is angry." Wu Shu said with a blank expression. "It has nothing to do with Li Zheng. It's all on my head. It doesn't matter if I go to the finals anyway."

After all, she turned and left. With all eyes on her eyes, she pulled the chair beside Li Zheng, knocked him on the head, and scolded, "Crazy!"

"Don't disturb me reading comics." Li Zheng turned to another angle.

Looking at Li Zheng like this, Wu Shu kept covering his face and smiled nonstop: "Don't be so hobby."

"I'm a macho, where is cute?"

"Just this one is more lovely haha."

They did not know that the intimate chats of no one here deeply angered Hu Zengwu.

"Okay, you two are good." Hu Zengwu flicked his arm and looked at the rest of the students with a sullen face.

Everyone looked at his horrified complexion, and he didn't dare to say more in half a word.

In fact, he still can't help but glance at Li Zheng and Wu Shu.

Wu Shu: "Why does this woman have something in her mouth, what did she say?"

Li Zheng: "Don't make trouble, you don't understand comics at all."

People around you, listen to this, you say me.

Anger.

Everyone feels angry.

Oh shit……

Compared with this, the small class counts as a ball.

Li Zheng has already won.

It is at this moment of antagonism.

A man stood up.

He pulled the gray shirt over his belt.

He carried the tray to the public laboratory bench.

He began to weigh.

This shifted everyone's attention.

The dog lord has been done.

Hu Zengwu also looked at the electronic screen again: "2.63g, yes, go to the laboratory next door."

Shen Yiyun quickly picked up the book: "Ou Xing Zhuo right?"

"The star of the stars, the searing searing." Ou Xingzhuo took the tray, turned to Hu Zengwu, and lifted his glasses. "Mr. Hu, I need to remind you that Wu Shu is a gold medalist in the International Physics Olympiad. Ranked second in the world, it is a first-class outstanding person anywhere on this planet. She may not need your tutoring at all."

"?????" Hu Zengwu's entire face began to become purple, staring at Ou Xingzhuo, and he didn't even say a word.

"Besides, my level is limited, let me give you the opportunity to cultivate it to the better classmates." Ou Xingzhuo then turned around and walked back to the position, took the chair and leaned beside Li Zheng and Wu Shu, "Look Does the comic take me?"

The squad of two became a trio.

It is also the top three in the class.

Hu Zengwu froze for a while, and finally rushed to the entrance of the laboratory in anger.

"Who are you this time? I don't care anymore. Do it yourself!"

"Teacher~~Don't wow teacher~~" While Shen Yiyun chased out, he didn't forget to turn his head to look at Li Zheng, blinking secretly.

I don't know why.

Thanks a lot!