Reborn I want everything

Chapter 17 The challenger hits the gun directly (you can skip these two chapters if you don’t want to read chemistry)

(If you don’t want to read the details of science, you can skip these two chapters and read the results directly. The protagonist passed the additional chemistry test.)
The familiarization of the venue and warm-up before the exam are of course supervised by teachers from Tunghai University.

So of course it is impossible for Gu Zhe to directly practice the experiment that will be passed in the ICHO Global Finals to be held in Groningen, the Netherlands, otherwise he will fail.

For the whole day today, Gu Zhe's plan is to practice basic skills, and finally hone the important skills that will be used in tomorrow's official exam, such as organic liquid separation, extraction, and condensation separation.

There is nothing to describe the specific process, anyway, it is all boring chemical content, which is not of interest to laymen.

Gu Zhe's operation is very stable and proficient, he is very precise in grasping the density difference of the layered mixed solution, and he is also proficient in the use of volatile separation——

It’s a bit abstract to say so, but in a popular analogy, it’s equivalent to his mastery of density separation, which can surpass that of top layered cocktail bartenders.And his mastery of temperature separation can also reach the level of a "God of Tempura" fried chef.

In fact, it is a bit of a dimensionality reduction blow for someone who does a good job in chemistry experiments to compete in cooking, otherwise there is no "molecular cuisine".

It's just that scientists don't bother cooking under normal circumstances, and their skills are only suitable for steaming, frying, and roasting, and they have to use special precision equipment.It is a bit difficult for a chemist to fry, fry, or compare a knife.

The candidates from Ark No. [-] Middle School next to him stared at Gu Zhe for a while, but they didn't see any hip stretching points. They were also secretly startled, and couldn't help being surprised:

In the provincial finals last year, I didn't remember that Zhenyang Middle School had such a solid player in experimental operations. How did this guy come out?Or did it suddenly improve?

The supervisor watched for a while, and stopped behind him several times, casting appreciative glances.

All of this is of course thanks to luck being on Gu Zhe's side - who asked him to participate in the chemistry competition, among the four major categories of mathematics, physics, chemistry and biology, the further you go, the more you need talent, and the further you go, the more you need experience.

Therefore, mathematicians often have young geniuses, and the Fields Medal is only given to those under the age of 40.

Creatures at the other extreme are very experienced, a bit like a doctor, they need to accumulate summaries, and the older they are, the more popular they are.

Physical chemistry is considered moderate, but physics is relatively more theoretical, and chemistry is relatively more experienced. This allows Gu Zhe, a reborn middle-aged man, to take advantage of his skills and recover his skills in just two weeks after resuming training.

If he had participated in the Math Olympiad back then, he would have been sent directly after his rebirth, without having to struggle.

……

The whole morning of basic training did not happen unexpectedly. After lunch, everyone took a break and went back to continue training.

Gu Zhe didn't bother to care about others, he only focused on his own affairs.

It was the supervisor who noticed that there was one more person in the afternoon than in the morning, and he immediately asked about his duties:

"That student wearing square glasses, you don't seem to be from this laboratory, do you? Please go back to your own laboratory. Xu Xiang, don't just drag other students to your laboratory table!"

Hearing this, Gu Zhe took a look back while the operation was not busy, only to notice that there was another person next to Xu Xiang who claimed to be "Ninth in the Provincial Examination in the Provincial Final" in the morning, and the two were still chatting. whisper.

Faced with the teacher's doubts, Xu Xiang quickly explained: "Teacher, I have some doubts in the operation, and I would like to ask my classmates to discuss it to ensure that there will be no illegal operations. He is from the laboratory next door, and this is his admission card."

With that said, he handed over a certificate.

The familiarization of the venue before the exam is not so strictly controlled. As long as you register, you can still walk around the laboratory.

"Feng Tao, right? You must abide by the laboratory discipline." After reading the documents, the supervisor asked him to record truthfully in the ledger, and then let him go.

Teachers always treat top students with extra grace.This supervisor is also teaching chemistry at Zhu Kezhen College, so he naturally hopes to select the best among the best students in the future.

He had seen the list of candidates who came to take the exam this time before, and knew that this Feng Tao was considered strong in Ark No. 5 Middle School, and he got No.[-] in the provincial final last year.

Moreover, Feng Tao is typically stronger in experiments and weaker in theory.If it is really a single comparison of the experimental level, it is possible to be in the top three in the province.

He is also a direct victim of the unspoken rule issued last year by the provincial government temporarily, "candidates from a single school and region are not allowed, and monopoly competitions are selected to send to the national team and recommended places".

After all, if the last quota hadn't come down wearing a hat and nominated to take care of the areas with backward education, Feng Tao might have been stuck and recommended in advance.

Xu Xiang, who was in the same class as him, was also dissatisfied with that policy, but the degree was not so obvious after all.Because the ninth in the province belongs to him, no matter whether there is the new unspoken rule or not, it will not be his turn.

Just now Xu Xiang practiced all morning by himself while secretly observing Gu Zhe's operations. He found that Gu Zhe had something to offer, so he invited the strongest of his alumni from other labs during lunch break.

When Feng Tao heard that there was a master from Zhenyang Middle School here, he was naturally extremely jealous, and immediately came to meet for a while—although it was Zhang Ming who grabbed his spot last year, and he was not even in the same class as Gu Zhe, so it was no accident.

How much enmity is it to snatch someone and send them away, and it is understandable to be a little angry.

Feng Tao knew very well in his heart that if Gu Zhe was indeed ranked second in Zhenyang Middle School, and I heard that he was ranked first before, and he crushed him again, it would more or less prove the selection criteria of the Ministry of Basic Education The absurdity and biased frame.

Even if nothing can be changed, making a big fuss about it in the media can attract social discussion.For this reason, he secretly brought a digital camera with him today, and recorded some material whenever he had the opportunity to slap his face. After all, he would not have the opportunity to take pictures during the official exam.

As for offending others, Feng Tao is not afraid of offending others.

Moreover, the Department of Education is also divided into many functional agencies. Universities are managed by the Department of Higher Education, and middle schools are managed by the Department of Basic Education. People in the Department of Higher Education may not care about the Department of Basic Education being bullied.

Finally, Feng Tao has another layer of insurance - he has already entered Donghai University, which is a C9-level university directly managed by the Ministry, and the Provincial Department can't get in. The Provincial Department can only manage those garbage provincial universities. Interest positions are inherently different.

With this thought in mind, Feng Tao really wanted to know Gu Zhe's bottom line. After observing secretly for a while, he felt that these simple operations did not show his ability, so he decided to challenge the big ones with difficulty.

Of course, the content cannot be randomly selected, otherwise it will appear too deliberate.He saw that Gu Zhe was mainly practicing extraction, so he was also trying to improve the difficulty in the field of extraction.

Feng Tao is worthy of being a master, and soon thought of a way to show off his skills.

……

About half an hour later, Feng Tao practiced a round of "multi-layered liquid surface layered protection extraction" under the eyes of the supervisor's approval.
Gu Zhe didn't bother to pay attention at first, but even the teacher praised him, so he followed suit.

The so-called "layered protection extraction" can be compared with the principle that laymen can easily understand. To put it bluntly, it is an operation of "using the mutual repellency of oil and water to prevent the target solution to be extracted from causing cup hanging errors".

For example, anyone who has studied chemistry in junior high school knows that in many chemical experiments, when preparing solutions, the accuracy is required to be "accurate to 0.01 ml", that is, to analyze the volume of half a drop of the burette.

But many people have thought about it when they were studying: It is really not difficult to control 0.01 ml with a burette, but if the solution is prepared so accurately, the subsequent reaction process has to be poured in various containers. Will the solution not "hang on the wall"?

(Experiments that can be diluted, washed flasks and test tubes are out of the scope of the discussion. Only those cases that cannot be washed or diluted are discussed here.)
No knowledge of chemistry is required for this, and anyone with a little life experience can imagine that after drinking Moutai, there is still a few tenths of a milliliter hanging on the wall of the cup.

If these errors are not erased, and you can't achieve "no cups hanging on the container wall", then no matter how accurate the burette is before you adjust it, it will be futile.

At this time, protectively adding a layer of mutually exclusive solution on the solution to be extracted will be very helpful to solve the error of hanging the cup——

Still take chicken soup as an example.Anyone who has steamed the steam pot chicken in southern Yunnan knows that when you pour chicken soup, as long as the layer of yellow chicken oil is thick enough, when the liquid level drops, you will find the inner wall of the pot with your hands. Only oil, no broth.

This is to use the mutual repulsion of oil and water, the surface tension gap between hydrophilic and hydrophobic substances... and so on, to force the clear soup down with the help of chicken fat.

There is a position where the chicken oil hangs on the cup, and the clear soup can't be hung.

In a chemical experiment, when you want to extract an aqueous solution, it is deliberately sealed with a layer of oil.Then release the liquid from the bottom of the separatory funnel, and the oil will force the water down to drain the water precisely.

The oil uses its own hanging cup to protect the water from being hung, and the error is reduced by one or two orders of magnitude.

Of course, this kind of protective extraction cannot be used casually, and the conditions are very harsh, because you must first ensure that the experimental reactants you want to separate will never dissolve in the protective oil, and the new error it brings is much smaller than the hanging cup error. To consider the density difference of various adjusted liquids...

In short, the details are extremely complicated, and they cannot be explained clearly in a few thousand words, so I won't go into details.

And Feng Tao’s operation just now, on the basis of the basic "protective extraction", also added "multi-layers", that is, there is a water-based layer under the oily layer, and there is an oily layer below, alternately many times.

Then it is close to the understanding of the top layered cocktail bartenders. They must have a very deep understanding of the mutual solubility and mutual repulsion, density difference, and surface tension of various solutes and solvents.

Otherwise, if you are not careful, the "Shooter" cocktails with clear layers such as "B-52" will be mixed into a paste like "foreign surname brains".

After some operations, Feng Tao actually used simple equipment to prepare a four-layer protective extraction solution.

This level of difficulty not only amazed the surrounding students, but even the supervising teacher nodded slightly in approval.Although this thing is not used in exams and competitions, it is definitely useful for showing off skills and showing a person's solid basic skills.

After Feng Tao succeeded, he stopped hiding, walked up to Gu Zhe, and said bluntly: "Student, you have been practicing extraction, are you interested in trying this multi-layer protective liquid separation operation. If you can divide into four layers, I will obey you."

While washing his hands, Gu Zhe said innocuously, "Why do I want you to obey me? Exams don't need such fancy things."

"You..." Feng Tao was at a loss for words for a while, and he choked for a few seconds before he smiled, "Then can I ask you to teach me? I just want to learn from each other and learn from each other."

(End of this chapter)