Chapter 133: Create ___ for you out of thin air

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Shen Yiyun looked at Shi Yang, who was gradually enchanted, but looked very annoying. He turned to Li Zheng and asked, "Do you know what the scoring rate was for this question last year?"
Li Zheng heard the words, busy holding his unicorn arm and said: "Um... follow the steps, how can you make 1 gram?"
"You think too much." Shen Yiyun glanced at Li Zheng, his head lowered, his sharp eyes shot from the angle between the lens and his eyes, "Liucheng students, the final product is 0."
"?????"Li Zheng's back spine was cool, "This is all the people who participated in the finals, all these 40 points are gone?"
"Yes, by the way, I only scored 45 points in the experiment, which was also the national gold." Shen Yiyun straightened his glasses, learning how his tutor pretended to beep, and said coldly.
"Although the steps of this experimental question are all told to you, there is still room for blanks, and candidates need to judge the phenomenon by themselves and adapt accordingly."
"Slight carelessness will cause side reactions."
"Too conservative will result in insufficient productivity."
"Therefore, doing experiments is not a simple learning method, it is a double examination of the theoretical basis and field experience."
"Simple exam experts will inevitably collapse."
"99 points is no exception."
Li Zheng always looked at Shi Yang without squinting.
This question only clarifies the dosage requirements for the two raw materials of salicylaldehyde and diethyl malonate. As for the subsequent catalysts, reactants and operations, only a general description is given.
It's like "Old Soy Sauce", "Half Spoon of Sugar" in the recipe, "Sauté for a while".
And this is the most important room to play.
Not only does the cook need to control the appropriate dosage, but also to play on the spot and adjust the technique according to the cooking situation.
A little carelessness is a bad dish.
In chemistry, there are also acidity and alkalinity, temperature, reaction, excess reaction, side reaction, and catalyst reaction. As long as a mistake is made, the product will be completely different, and eventually all will be lost.
Thinking about it, Cobalt God has turned on the oil bath switch and started heating and refluxing.
The oil bath is a heater similar to an oven, used to complete the reaction that requires heating in the experiment.
However, this reaction will cause evaporation, resulting in experimental losses.
Therefore, a condenser tube needs to be placed on the beaker to allow the steam to condense into drops and return to the bottle.
This process usually takes more than half an hour. The experimenter only needs to fix the on the oil bath to a temperature to prepare for other things.
But the cobalt does not.
He held the in his right hand and lifted his glasses in his left hand, staring at the liquid in the beaker.
Time passed by one minute and one second.
The test solution will soon have a tendency to boil.
At this time, Cobalt God finally twisted the carefully to control the cooling.
He could calm down a little bit, and he adjusted the temperature again to heat.
Li Zheng glared.
Isn't this the perfect roast duck chef?
Between the luck and luck, Shen Yiyun commented softly: "He is fighting for time."
"Why do you see it?" Li Zheng humbly asked for advice.
"I ask you, what will happen if the temperature is too high and the backflow is intense?" Shen Yiyun asked.
"Liquid flooding." Li Zheng, after all, was the man who carried the entire recipe, and quickly replied, "It will produce fluid accumulation, which will reduce the efficiency of the reaction and even cause side reactions."
"Very good, so in this experiment, when doing heating and reflow, it is recommended to use a temperature of about 80 ° to control the reflow rate within a stable range." Shen Yiyun laughed, "But Shi Yang, obviously playing with fire, strives to Stuck at the critical point of the flooding state, complete the reaction as quickly and efficiently as possible."
Li Zheng nodded and said, "It's like cooking a noodle, you have to open a large fire, thinking that you can control it just like the person who is not the pot."
"This metaphor is good..." Shen Yiyun narrowed his eyes and lifted his glasses. "But they are all bruised."
"Hush." ​​Cobalt God raised his hand and made a sound-collecting gesture.
"Uh..." Shen Yiyun gritted his teeth.
I understand excellence.
But you kid, who is smart, has just made a big mistake.
Wait for the finished product, see if you can laugh!
Li Zheng did not think so much, but just tried to absorb the student luck.
In the following time, the cobalt god, as in Li Zheng's question, concentrates his attention and does not say a word.
Precipitate crystals, filter with suction, wash with ethanol, recrystallize... Add sodium hydroxide, heat to reflux again... Pour the reaction into concentrated hydrochloric acid water...
All these processes have artistic beauty, chemical mania, and Shisao operation at the same time.
Even if he can't absorb the student movement, Li Zheng will surely watch it intently.
Three hours passed.
After repeated crystallization and suction filtration, it finally entered the drying process.
In the end, a large white lumpy granular crystal was obtained.
After putting the finished product into the tray, the Cobalt God smiled magically, took a step back, returned to the state of Shi Yang, and raised his hand: "Please."
He found out that Shen Yiyun was gone.
It turned out that I slept on the side table.
"Eh, this proctor..." Shi Yang turned to Li Zheng immediately.
This guy is still intently looking, still looking very energetic, still breathing desperately.
Shi Yang then bypassed the test bed and persuaded: "Brother, you can't smell it, and it's not good to smell too much of this thing."
"Oh, it's over?" Li Zheng then closed his eyes and took a short break.
[Student Luck: 7.8]
Rich harvest.
Not only experimental skills, but also a lot of mysterious comprehension. I feel that after reading it again, I also have a lot of experimental inspiration. In short, it is very itchy.
Shi Yang looked at Li Zheng and smiled: "There are many types of coumarin. Like this coumarin-3-carboxylic acid, it is not actually necessary to do so. I can probably come up with seven or eight methods of preparation. In our experiment, there are many reagents that can be replaced with other reagents. If not restricted by reagents, I can make several perfumes for you on the spot."
"Miao." Li Zheng couldn't help sighing, "Where did you get so much inspiration?"
"Oh, there is nothing new in it, just like Lego. You can spell out everything if you play more." Shi Yang said, "At the beginning, when I saw chemistry, it was colorful. The solid-liquid gas changed back and forth. It’s very interesting to explode, and I really started to do it later... I discovered that I was playing with elements and molecules, bonds and rings."
Shi Yang said and waved his hand again: "Oh, it's not interesting to say that. I have had the opportunity to talk to our classmates several times, and I want to introduce some girls for our chemical competition, and everyone ran away..."
"Talk, talk, I listen, I love to listen." Li Zheng began to breathe in again.
"You are already in the circle..." Shi Yang was a little disgusted, "And you are not a sister..."
"Damn, don't be so despised," Li Zheng scolded on the spot. "We can use a piece of toilet paper to make friends. Can the girl do this with you?"
"This...but..." Shi Yang couldn't refute after all, so he continued to draw up, "The fun is that in the micro world, these small parts are disassembled and assembled, and they are assembled at will. The things that are assembled every time are still Not the same. There are many things that can be assembled in theory, but no one has succeeded, and there are even things that should not be assembled in theory, but can be inexplicable. I feel that this life is simply not enough."
Li Zheng said blankly: "Is there a feeling of the creator of the micro world?"
"Oh, I was a little when I was a kid, but the more I knew it, the more I was in awe." Shi Yangtu shy again and wiped his nose with a smirk. "It's almost the same as an adventurer."
Li Zheng heard the words, while absorbing the student luck, he sighed: "Ashamed, Brother Shi, what you said about the experience, I have never experienced it, and I don't know whether it is the gap in talent or the gap in the realm."
"It's not to blame you, all to blame the textbooks." Shi Yang scolded immediately, "You read the high school textbooks, is that written for people? When you come up, you will be memorized.
Speaking of this, Shi Yang knocked up.
"Alcohol dehydrated into alkenes." Li Zheng said awkwardly, "Three to one sulfate ethanol?"
"My Nima...you are too hard to memorize these." Shi Yang then scolded, "To learn chemistry, first learn the charm of chemistry and then learn, just as if you haven't even heard the music, just go and learn. Music theory, you need to memorize the score or something, this is a hair."
"It makes a lot of sense," Li Zheng murmured, "then what makes it possible to appreciate the charm of chemistry?"
"Hey~" Shi Yang smiled without a word.
Li Zheng was somewhat afraid: "Even if the sodium is enough, the cottage is not enough."
"Just kidding, the experiment is right. It's better not to be a proposition experiment, but an experiment that can be played freely." Shi Yangyue said more and more excited, "For example, I can use the instruments and materials in this room to make it out of thin air for you. Shit, do you believe it or not?"
"I...I believe..."
Looking at Shi Yang's fanatical look, Li Zheng gradually felt that perhaps what motivated him to study chemistry was not the charm of chemistry, but the attachment to a certain substance.
This luck, the mother is not too dare to take it.
On the other side, Shen Yiyun was finally awakened, and looked at his face confusedly.
"Ah! The cafeteria is out of food!" She just got up in a panic and hurriedly put on her glasses and pretended to be a teacher. "Oh... finished, um... waited a long time?"
"It's okay." Shi Yang immediately avoided Shen Yiyun's gaze, bursting out with a strong man's smile, and waved his arms with air, "The volatilization point is not tight, enough."
"Not enough is not what you said." Shen Yiyun tried his best to get up and walked around to the experimental table, looking at the white crystal.
The expression also panicked.
How much?
She raised her glasses and asked, "Is salicylaldehyde added in the follow-up test?"
"No." Li Zheng said, "I didn't close my eyes during the whole journey. I didn't touch any drops of salicylaldehyde and diethyl malonate."
"Um...then...weigh it..." Shen Yiyun put on the gloves, carefully lifted the watch glass with both hands, placed it on the electronic scale, and then squatted down halfway, aiming at the display screen.
Then she shivered.