"That's the third time this month!" "Junior sister..." "It's no use calling you Junior Sister. Be prepared to be punished." "Gu..." "Don't be dissatisfied. It's a rare occasion for us to have guests in the prison today. Are you going to entertain them like this?" The two of them still knew their priorities. When they heard that a guest was coming, they immediately got up, dusted off their clothes, and tidied their appearance. The disciples turned their eyes to Li Qingcha. "You are……" "Are you..." "Master Li!?"
Scream×n. Li Qingcha couldn't help but shiver. The way these people looked at me was so corny and affectionate, just like a novice meeting an oiran for the first time. She swallowed and asked, "How did you recognize me?" Immediately, a female disciple replied with a smile: "Junior sister talks about you every day. If we can't recognize you, then... um...! @*#￥%..." The following words became garbled characters. "Senior sister!" Luo Weiyang rushed over with a red face and blocked the female disciple's mouth. This reaction is like a cat with its fur standing on end. The other brothers and sisters tried hard to hold back their laughter. Some even went so far as to wink at Li Qingcha and give him a thumbs-up. Li Qingcha pretended not to see it and looked away. The group laughed even more happily. Finally, a male disciple stopped smiling and said, "Mr. Li, we have done many experiments to prove the alum, but we still cannot summarize clear steps. Please Mr. Li... please help us solve the problem." "Please enlighten me, Mr. Li." "Please enlighten me, Mr. Li." "Please enlighten me, Mr. Li." Someone took the lead, and all the disciples asked for advice in unison. Li Qingcha was stunned for a moment, then looked at Luo Weiyang. The girl raised her lips slightly, and said a little arrogantly: "Why are you looking at me? If you want to answer it, then answer it. I can't stop you."
Li Qingcha complained: "Even if you don't stop me, they will." "Then I can't control it." "..." There's really nothing I can do with this girl. Li Qingcha thought about it and felt that it would be no big deal to impart some junior high school chemistry knowledge, so he walked into the laboratory. The disciples exchanged glances briefly and quickly followed. The laboratory of the Imperial Observatory is quite professional and has a large number of glass instruments. Although their shapes are slightly different from modern ones, one can roughly guess their functions based on experience. Li Qingcha looked around and asked, "Where's the test tube clamp?" Everyone:? ? ? "What...what test tube clamp?" "Forget it." Li Qingcha sighed silently, picked up a test tube and placed it 20 cm below his nose, then fanned it gently with his hand. An expert can tell whether it is good or not with just one move. The disciples of the Imperial Observatory had never seen such a high-end operation as the Fan Wen Fa. It was as if they had seen a foreign scene. When they thought about how they usually operated, they couldn't help but feel ashamed. There is always someone better. Today, I finally met the master who has been hiding from the world! Li Qingcha didn't know that he had been regarded as a big shot. He put down the test tube in his hand, wiped his hands and asked: "Where is the alum?" A female disciple answered: "Over there." Li Qingcha looked over. I saw a jar of alum placed next to a device similar to an alcohol lamp. "How can alum be left near an open flame?" "what?" "Alum must be stored in a dry, moisture-proof, and heat-proof place. Don't you even understand the most basic principle?" "Yes...I'm sorry!" The female disciple being lectured stood at attention like a primary school student. The others were also silent, feeling that attending Li Qingcha's class was even more terrifying than attending Jianzheng's class, as they might be called up to answer questions at any time and face the "fatal disaster". Unfortunately, it is easy to invite gods but difficult to send them away. The class has already started and they have no choice but to regret.
Li Qingcha said, "Come here, help me." "Gudu..." There was a loud swallowing sound in the room. All the disciples lowered their heads. Luo Weiyang frowned and thought to herself that these brothers and sisters were really cowards. How come they didn't even dare to give a helping hand? did not expect, "Miss Luo, come and help me." Li Qingcha's voice rang out. "Hiss..." Luo Weiyang took a breath of cold air, and her mind raced as she quickly came up with ideas. She covered her lower abdomen, "I... my stomach hurts! Oh~ It hurts so much~ It hurts so much that I want to roll over~" "..." "It's time to roll around." Can you pretend to be more serious? Li Qingcha was speechless. Her eyes swept across the laboratory, finally landing on the female student who helped her point out the alum, "What's your name?" Female disciple: !!! She said in panic, "Mr. Li, when we do experiments, we always use women as men and men as animals. You might as well ask an animal for help instead of me!" Li Qingcha smiled, "No need, it's you. I think you're good enough." "..." "What's your name?" "Dong Si." "Okay, Dong Si, you are my assistant now. Everyone else come over here and watch how I do it." Everyone looked at Dong Si with pity, then moved closer to watch Li Qingcha's experiment in separating aluminum hydroxide flocculent precipitates. The door to the world of chemistry slowly opens. “So this is how filtering works…” "What's this called?" "Diversion, didn't you hear what Mr. Li just said?" …… Everyone was fully engaged. Seeing the senior brothers and sisters surrounding Li Qingcha, Luo Weiyang quietly pursed her lower lip.
She felt a sour-sweet feeling in her heart, as if she had accidentally bitten into a berry that was not fully ripe, green and delicious. Chapter 16: Beat chicken blood How can you do a good chemistry experiment if you don’t even have the basic knowledge? Li Qingcha taught from the beginning. "The standard for cleaning glassware is that the water film attached to the inner wall is uniform, neither gathering into droplets nor flowing down in streams." "Use a medicine spoon to take the powder, and fold the paper into a groove." "Perishable drugs have a short shelf life, and flammable and explosive drugs should be kept away from fire sources." …… Everyone was confused by what they heard. Finally, someone couldn't help but say, "Mr. Li, you just mentioned things like diversion and filter paper. Because they will affect the purity of the solution, we need to pay more attention to them, but these..." The following words were not clearly stated. But Li Qingcha knew what the other party wanted to express. She glanced at Dong Si beside her. "Tell me, what happened to the glass tube when it was dissolving and purifying the natural soda ore just now?" "Hmm... a little hot..." "That's it." Li Qingcha said, "Because this process only releases a small amount of heat, it doesn't matter if you hold it with your hands, but what if the heat is very serious? Aren't you afraid of getting burned?" Everyone suddenly realized, It turned out that Mr. Li was worried about their safety. They couldn't help but smile and said, "Don't worry, sir. We have ways to protect ourselves." Li Qingcha couldn't help but sigh, "That's you. If ordinary people were so careless when doing experiments, big problems would arise." "Ordinary people?" "Yeah, what's the problem with what I said?" "Does Mr. Li want to spread the refining techniques of the Imperial Observatory to ordinary people?" As if they had heard some breaking news, all the disciples of the Imperial Observatory showed surprised expressions. Then, surprise turned to laughter, Dong Si on the side whispered: "Mr. Li, your idea is very good, but the problem is...the problem is..." Hesitant to speak. Li Qingcha chuckled, "You mean, this is difficult?"
Dong Si answered subconsciously: "Of course it's difficult." The others followed suit and nodded, apparently unable to understand Li Qingcha's thoughts. Li Qingcha took a deep breath. “Indeed, considering the literacy rate, most people cannot read the classics you wrote. In addition, the cost of glassware is high, and it is difficult to popularize it. But, are these really problems? "Imperial Astronomical Observatory, don't you have any pursuit at all? "But I heard that Confucianism has the lofty ambition of 'establishing a mind for heaven and earth, establishing a destiny for the people, inheriting the lost knowledge of the ancient sages, and creating peace for all generations'. Don't you want to be a model for all generations?"