Shen Yiyun looked at Shi Yang who was gradually obsessed with him, but he looked disgusted. He turned to Li Zheng and asked: "Do you know what the score rate of this question was last year?"

Hearing this, Li Zheng hurriedly pressed his Qilin arm and said: "Well... follow the steps, how can I make 1 gram?"

"You are overthinking." Shen Yiyun glanced at Li Zheng, lowered his head, and his sharp eyes shot out from the angle between the lenses and his eyes, "Classmate Liu Cheng, the final product is 0."

"???" Li Zheng felt a chill down his spine, "These are all people who participated in the finals, and all these 40 points are gone?"

"Yes, by the way, I only got 45 points in the experiment that year, which was also the national gold medal." Shen Yiyun straightened his glasses, imitating the way his instructor pretended to be, and explained coldly.

"Although the steps for this experimental question have been told to you, there is still some blank space. The candidates need to judge the phenomenon by themselves and adapt accordingly."

"If you are not careful, it will cause side effects."

"Too conservative will result in insufficient yield."

"Therefore, doing experiments is not just a simple learning exercise, it is a dual assessment of theoretical foundation and on-the-spot experience."

"A pure examination expert will inevitably fail because of this."

"99 points is no exception."

Li Zheng kept looking at Shi Yang intently, deeply convinced of this.

This question only clarifies the dosage requirements for the two raw materials salicylaldehyde and diethyl malonate. As for the subsequent catalysts, reactants and operations, it only gives a rough description.

Just like the recipe says "a little dark soy sauce", "half a spoonful of sugar", and "stir-fry over low heat for a while".

And this is the most important space for performance.

The chef not only needs to control the appropriate dosage, but also needs to act on the spot and adjust the technique according to the cooking situation.

If you are not careful, it will be a bad dish.

In chemistry, there are acidity, temperature, reaction, excess reaction, side reaction, and catalyst reaction to consider. As long as one mistake is made, the product will be completely different, and ultimately everything will be lost.

While thinking about it, Cobalt God had already turned on the oil bath switch and started heating and refluxing.

The oil bath is a heater similar to an oven, used to complete reactions that require heating in experiments.

However, this reaction will cause evaporation, resulting in experimental losses.

Therefore, it is necessary to place a condenser tube on the beaker to allow the steam to condense into drops and flow back into the bottle.

This process usually takes more than half an hour. The experimenter only needs to fix the knob on the oil bath pot at a certain temperature to prepare for other things.

But Cobalt God doesn't.

He held the knob with his right hand, raised his glasses with his left hand, and stared at the liquid in the beaker.

Time passed minute by minute.

The test solution has a tendency to boil very quickly.

At this time, the Cobalt God finally carefully turned the knob to control the cooling.

After calming down a bit, he adjusted the temperature slightly.

Li Zheng stared.

Isn’t this all Jude’s roast duck chef?

While feeling hesitant, Shen Yiyun commented softly: "He is fighting for time."

"How can you see it?" Li Zheng humbly asked for advice.

"Let me ask you, what will happen if the temperature is too high and the backflow is violent?" Shen Yiyun asked.

"Liquid flooding." After all, Li Zheng was the man who had memorized the entire recipe. He quickly replied, "It will produce fluid accumulation, which will then reduce the reaction efficiency and even cause side effects."

"Very good, so in this test, when doing heated reflow, it is recommended to use a temperature of about 80° to control the reflow speed within a safe range." Shen Yiyun smiled, "Ke Shiyang, he is obviously playing with fire. , strive to get stuck at the critical point of the flooding state, and complete the reaction as quickly and efficiently as possible.”

Li Zheng nodded and said yes: "It's like someone who insists on turning on high heat when cooking noodles, thinking that he can control it just enough to keep the pot from clogging up."

"This metaphor is good..." Shen Yiyun narrowed his eyes and raised his glasses, "But they are all bruised." Mobile version::

"Shh." God Cobalt raised his hand and made a gesture to silence himself.

"Uh..." Shen Yiyun gritted his teeth and glared.

I understand striving for excellence.

But you kid, you are so smart, you have just made a big mistake.

Wait until the finished product is released and see if you can still laugh!

Li Zheng didn't think much about it, he just tried hard to absorb his academic luck.

In the following time, Cobalt God was just like Li Zheng when he was writing the questions, concentrating on it and not saying a word.

Precipitate crystals, suction filtrate, wash with ethanol, recrystallize... Add sodium hydroxide, heat and reflux again... Pour the reactants into concentrated hydrochloric acid water...

Each of these processes possesses artistic beauty, chemical fanaticism, and Shi's showmanship at the same time.

Even if he couldn't learn from it, Li Zheng would definitely watch it intently.

Three hours passed like this.

After crystallization and suction filtration again and again, it finally entered the drying process.

Finally, a large white lump of granular crystals was obtained.

After placing the finished product on the tray, Cobalt God smiled devilishly, stepped back half a step, returned to Shi Yang's state, raised his hand and said: "Please."

Only then did he realize that Shen Yiyun had disappeared.

It turned out that he had fallen asleep on the table next to him.

"Hey, this proctor..." Shi Yang immediately turned to look at Li Zheng.

This guy couldn't turn his eyes away, he was still looking very excited, and he was still breathing hard.

Shi Yang then walked around the test stand and stepped forward to persuade: "Brother, you can't smell it, and it's not good to smell it too much."

"Oh, it's over?" Li Zheng then closed his eyes and took a short rest.

【Student movement:7.8】

The harvest is rich.

Not only the experimental skills, but also a lot of mysterious insights. I feel like I have a lot of experimental inspiration after reading it again. In short, I am very itchy.

Shi Yang looked at Li Zheng and laughed: "There are many types of coumarins, such as this coumarin-3-carboxylic acid. In fact, it is not necessary to do this. I can probably think of seven or eight ways to make it. In our experiment, many reagents can be replaced with other ones. If it were not for the reagent restrictions, I could make several perfumes for you on the spot."

"Wonderful." Li Zheng couldn't help but sigh, "Where do you get so much inspiration?"

"Oh, actually there's nothing new. It's just like playing with Lego. If you play more, you can build anything." Shi Yang gestured, "When I first saw chemistry, it was colorful. Solids, liquids and gases were converted back and forth, and there were also... Explosions were very interesting, and then I actually started doing them...and then I realized that what I was playing with were elements and molecules, bonds and rings."

Shi Yang said and waved his hand again: "Oh, it's pointless to say this. I have had the opportunity to tell the girls in our class several times that I wanted to introduce some girls to our competitive circle, but they all ran away..."

"Speak, speak, I listen, I like to listen." Li Zheng began to take a deep breath again.

"You've already joined the circle..." Shi Yang was a little disgusted, "And you're not a girl..."

"Damn it, don't be so focused on sex over friends." Li Zheng scolded on the spot, "Our friendship is based on a piece of toilet paper. Can a girl do this with you?"

"That's... that's true..." Shi Yang couldn't refute after all, so he continued to make gestures, "The fun part is that in the microscopic world, you can take apart these small parts and assemble them at will, and the things you assemble will still be the same every time. They are all different. There are still many things that can be assembled in theory, but no one has succeeded yet, and there are even things that should not be assembled in theory, but can be produced inexplicably. I feel that this life is simply not enough."

Li Zheng said blankly: "Do you feel like the creator of the microscopic world?"

"Haha, I had some when I was a kid, but the more I know, the more I am in awe." Shi Yang suddenly became shy again, wiped his nose and said with a silly smile, "You can't say he is an adventurer."

Hearing this, Li Zheng sighed while absorbing his academic experience: "I am ashamed to say that I have never had the experience you mentioned, Brother Shi. I don't know if it is a difference in talent or realm."

"It's not your fault, it's all the fault of the textbooks." Shi Yang immediately scolded, "You read the high school textbooks, are they written for others? They ask you to memorize them as soon as they come up, what is the water but not the alcohol..."

When Shi Yang said this, he stuttered.

"Alcohol is dehydrated into alkene." Li Zheng suggested awkwardly, "Sulfuric acid ethanol three to one?..."

"Holy shit... you're working too hard to memorize these things." Shi Yang then scolded, "If you want to learn chemistry, you must first appreciate the charm of chemistry before learning. It's like you have never even heard of music and you just try to learn it.

Music theory requires you to memorize music scores and so on, which is a waste of time."

"It makes sense." Li Zheng murmured, "Then how can we appreciate the charm of chemistry?"

"Hehe~" Shi Yang smiled but said nothing.

Li Zheng was a little scared: "Even if the sodium is enough, the latrine will not be enough."

"I'm just kidding, experiments are the way to go. It's better not to be a propositional experiment, but an experiment that can be performed freely." Shi Yang became more and more excited as he spoke, "For example, I can use the instruments and materials in this room to create something for you out of thin air.

Damn it, do you believe it or not?"

"I...I believe..."

Looking at Shi Yang's enthusiastic look, Li Zheng gradually felt that perhaps what drove him to learn chemistry was not the charm of chemistry, but his persistence for a certain substance.

Damn, I don’t dare to take away this luck.

On the other side, Shen Yiyun was finally woken up and looked at his watch in confusion.

"Ah! There's no food in the cafeteria!" She stood up in a panic, put on her glasses in a hurry and walked over, pretending to be a teacher, "Oh...it's done, um...you've been waiting for a long time?"

"It's okay." Shi Yang immediately avoided Shen Yiyun's gaze, smiled like a strong man, waved his arms and said, "It doesn't matter if it evaporates a little, it's enough."

"Whether it's enough or not is not up to you." Shen Yiyun tried his best to cheer up, walked around to the experimental table, and looked at the bowl of white crystals.

His expression also became panicked.

Why so many?

She raised her glasses and asked, "Did salicylaldehyde be added in subsequent experiments?"

"No." Li Zheng said, "I didn't sleep during the whole process. I never touched a drop of the two raw materials salicylaldehyde and diethyl malonate."

"Well... then... let's weigh it..." Shen Yiyun put on his gloves, carefully picked up the watch plate with both hands, placed it on the electronic scale, then squatted down and looked at the display screen.
Chapter completed!