"Aspirin, whose scientific name is acetylsalicylic acid, is a white crystal, soluble in ethanol, chloroform and ether, slightly soluble in water, because it has antipyretic, analgesic and anti-inflammatory effects, and is widely used in the treatment of colds, flus, fever, headaches, neuralgia, arthralgia and rheumatism...... It is usually prepared by the acylation reaction of salicylic acid and acetic anhydride catalyzed by concentrated sulfuric acid. The mechanism of the reaction is ...... The side reaction is ......"

First of all, Liu Feng memorized the experimental principles in the first section completely word by word according to the content in the experimental textbook.

At the beginning, Professor Yan was completely waiting for Liu Feng to be speechless, so that people would die, after all, such a bad student, it would be better to be driven out as soon as possible, out of sight and out of mind.

But I didn't expect that Liu Feng would come as soon as he opened his mouth, and the experimental principle, reaction mechanism, and side reactions were all said right by this guy!

Professor Yan looked at the gushing 'bad student' in front of him with some surprise, but he didn't expect that there were really two brushes, could he have wronged him?

Liu Weizhe also opened his mouth wide, no, the scumbag shouldn't be this kind of operation!

He saw that Liu Feng was talking endlessly, and at the beginning, he thought that this product was talking nonsense ~ a few ~ and didn't care, but as Liu Feng explained more and more deeply, he had to admit that what Liu Feng said was exactly the same as what was in the experimental textbook!

Shocking, unbelievable!

You must know that even if a scholar like him previewed the experimental class in advance, he could not memorize the use, experimental principles and side reactions of aspirin word for word, and also deepened his memory in the experiment.

I can't believe it, Liu Weizhe flipped through the textbook while corroborating each other with Liu Feng's statement, but I didn't expect that he really discovered this shocking fact by chance, Liu Feng was really memorizing the textbook!

Brother, this is a chemistry experiment class, not Chinese!

Liu Weizhe really didn't know what to say, in addition to being shocked or shocked, there was even a trace of jealousy in his heart, after all, this is something that even he, a scholar, can't do!

This is not scientific! This should not be the operation of a scumbag!

In Liu Weizhe's consciousness, Liu Feng should be the kind of waste who fights all day long with the game and waits for death all day long, it really shouldn't be this kind of performance!

Zhuo Tingting also listened to Liu Feng's recitation with a shocked face.

Yes, she also found that Liu Feng was reciting the textbook, although she did not look down on Liu Feng at all, but subconsciously still thought that Liu Feng was a scumbag, even if she had previewed the text in advance, at most she could only say a rough idea, how could there be such a word-for-word memorization of the textbook! Is this really the kind of scumbag who hangs up 5 compulsory courses in a semester? Zhuo Tingting was curious.

Liu Weizhe and Zhuo Tingting, who are college tyrants, both had shocked expressions, and the others even widened their eyes and looked at Liu Feng like monsters.

Like the rest of the 509 dormitories.

As the three scholars of 509, Su Chengdie, Sun Wei, and Chen Qingbo have always had little communication with Liu Feng, after all, there is naturally a gap between the top students and the scumbags.

In addition, Liu Feng always went out to work part-time last semester, and the three of them also focused on their studies all day long, so they knew very little about Liu Feng.

On weekdays, they often persuade Liu Feng like Sun Quan, but Liu Feng only smiled and refused the kindness of the three of them, and over time, the three of them were bored.

I didn't expect that the jokes and conversations in the mouths of the three of them on weekdays would have a counterattack on this day?

Similarly, as the head of the room, Lao Meng, the president of the student union, gets along with Liu Feng on weekdays, and has always been treated with the mentality of the eldest brother taking care of the younger brother, although he also knows that Liu Feng is smarter, and if he puts his mind on his studies, it should be no worse than the average scholar, but what he didn't expect was that this product was really a blockbuster!

As the brother of the upper bunk, Shi Shang has a lot of sadness at this time, and he is a scumbag who says that he is a scumbag, and you are actually betrayed!

Liu Feng didn't care about everyone's shock, at this time, he was all focused on searching for memories and then reciting them, and he didn't notice the change in the attitude of his classmates, especially Professor Yan, towards him.

"There are three steps in the preparation of acetylsalicylic acid, the first step: acylation. In a dry Erlenmeyer flask, add 4.3g of salicylic acid and 6ml of acetic anhydride, and then drop 7 drops of concentrated sulfuric acid, immediately match the stopper with a 100°C thermometer, the thermometer is inserted into the material, mixed well, heated in a water bath, slowly heated to 75°C under full shaking, and kept ...... for 15min"

"Step 2: Filtration of crystallization ......"

"Step 3: Recrystallization ......"

At this time, the entire laboratory was almost silent, only Liu Feng's experimental introduction was like a cloud.

Everyone held their breath, of course, under the spread of well-intentioned people, they opened the experimental textbooks one by one, and compared them with Liu Feng's introduction word by word, they found that in addition to punctuation marks and pictures, there was really not a single word, a lot of words!

Perverted!

All the scumbags scolded in their hearts, thinking that there would be one less capable person in our scumbag's circle?

These people looked at Liu Feng with resentment, their eyes were not only complicated or complicated, did this guy really hang up 5 classes last semester?

Especially the brother who failed 6 subjects, almost cried, I thought that I could surpass this buddy who failed 5 subjects by working hard, but I didn't expect it, I didn't expect it...... Woo! Inside is devastated......

As for the top students, they looked at Liu Feng's eyes one by one, as if they had met an opponent in Dugu's quest for defeat, and their fighting spirits were high.

"Fourth, the ...... of experimental instruments"

"Okay, okay, stop!" Just as Liu Feng was about to continue, Professor Yan finally interrupted Liu Feng's continued destruction of his classmates, nodded with satisfaction, and looked around at the sluggish students, "In my experimental class in the future, you will all be like this classmate!"

Children's Shoes: "......"

Professor Yan educated the students, turned his head with a complicated face, and looked at Liu Feng, he really didn't expect this thing to be so familiar with the content of the experiment: "In my class in the future, I am not allowed to sleep anymore!"

With that, he turned around and strode back to the test bench.

"Today, let's learn about aspirin, which is the preparation of acetylsalicylic acid. Turn the first page of the textbook......"

After a quiet set of turmoil, the day's experimental course finally began.

Although Professor Yan is bald and very strict with teaching, his knowledge is not bald, and a boring organic experiment course is listened to with relish under his interesting explanations and demonstrations.

After the teacher explained, then he practiced it himself, and finally the students did it themselves and operated the experimental process themselves.

For Liu Feng, he can open the hook with theoretical knowledge, but he can't open it with actual operation. Different from his theoretical explanation just now, which is like a cloud of water flowing with his peers, in practice, this product is more restless.

Clumsily erected the iron frame, followed by fixing the Erlenmeyer flask, grafting the distillation and cooling device, etc., a set of processes, I don't know how many times I knocked over the beaker, how many times I knocked over the measuring cylinder, in a word, it is in a hurry.

This made Shi Shang on the side see a lot of jokes, after all, when Liu Feng had just completed the first step of the acylation reaction, he had already started the third part and recrystallized, and for a while, the sense of gap in Shi Shang's heart was finally balanced a lot.

When the last step of recrystallization was completed, looking at the lovely white crystals inside the surface dish, Liu Feng burst into tears. It's not easy, it's not easy!

This made him have to sigh, it turns out that there is still a big gap between theory and practice! No wonder Mr. Wang Yangming always said that we should unite knowledge and action, and the words of the sage will not deceive me!