After five years of teaching support, Daming became an empire on which the sun never sets.

Chapter 85 I want to ask him about alchemy

Because it was the first time, Qin Yu didn't have a good grasp of the weight. All ten boxes were filled, and more than half of the pot was left.You can only take it out after the soap in the mold has cooled, and then pour it again.

Finally, it was all poured out, and more than 50 pieces of soap had been prepared.

"Sir, what are we making?" Seeing more than 50 pieces of soap neatly arranged, Zhu Chun, king of Shu, asked.

"It's soap," Qin Yu said, "but it's completely different from the soap you used before. The soap you used before was made of acacia, and this soap is pig pancreas soap made from the saponification reaction between fat and alkali."

"This thing can really decontaminate?" The crowd was obviously very suspicious.They have just seen with their own eyes that this thing is made of lard, and lard can only add pollution, not decontamination.

"Don't you know if you try it?" Qin Yu said.

When the crowd heard the words, one by one excitedly stepped forward to test.

Wet your hands first, then take the soap and rub it on your palms.Then a miraculous thing happened. The soap made of raw lard not only did not make their hands more dirty, but instead produced a lot of foam, which disappeared after a wash.

Washing hands in water quickly leaves their palms clean.

Some people even took their own clothes for testing, and they were clean by just rubbing them with their hands.

"It's amazing!" Prince Zhu Biao said excitedly.

"This thing is so much easier to use than the soap we used before!" Xu Miaojin exclaimed, "It is very comfortable to apply on the hands, but it is still very comfortable to wash with the previous soap."

"What's even more amazing is that it can be washed more cleanly than acacia." Zhu Yingrao said, "If everyone uses this to wash clothes, there is no need to beat them with a pestle!"

"Yeah." Qin Yu sighed for a while, "If I made it for you sooner, my 'Prada' wouldn't be broken." Looking at the clothes with a hole on the rope not far away, I felt distressed.

……

"Not bad, this is really a good thing!" Seeing the magical effect of the students' experiments, Xu Da also said.

After meeting the old guard on the side, he also said that it was really amazing: "Who would have thought that ordinary lard plus grass and ash water could make something so useful?"

He has lived for nearly 100 years, traveled all over the country, and his rich experience is unparalleled.He has seen almost all folk remedies and folk tricks, but he has never seen lard used to make soap.

"Such a simple material can make such a useful thing, it can be called wisdom!" The old man thought to himself, "He also said that it is a saponification reaction, what is the saponification reaction? I don't understand! This young gentleman's knowledge It's really unusual, no wonder Emperor Zhu attaches so much importance to him."

"My Xuan Xuanzi thinks he knows the world's affairs, and the world is clear, but he didn't expect that in front of him, he would still appear a little ignorant. The sage Yun and the three must have my teacher, and I will not deceive me."

"This kid is a layman in martial arts, and my knowledge is also a layman in front of him. He previously said that chemistry is the study of material changes, and change is the essence of alchemy. It seems that in the future, he will have to ask him more for advice. "

Lao Dao hid a two-person alchemy furnace in an extremely secret deep mountain, weighing several thousand kilograms.Previously, he had traveled all over the country to find grasses, lead, mercury, and cinnabar. Because his cultivation was too high, it was difficult to make progress. As a result, his alchemy furnace had not been used for decades.There is no way to use gold and stone as the outer elixir, and the fetal breath of the dragon and tiger as the outer elixir.

……

"Old Zhang, your clothes are so dirty that you can wash out three catties of mud. I'll give you a piece." At this moment, a piece of soap flew towards him.

"I'm used to being sloppy, Laodao, but I'm not used to it after washing it." After Laodao stretched out his hand to catch it, he wanted to throw it back to him.

"No!" Qin Yu said solemnly, "You are the guard of our Lujiacun Primary School. If you dress up as a beggar and have flies follow you all day, it will affect the overall image of the primary school, and it will also affect the children's learning and development. "

"You're chasing ducks on the shelves!" The old man was very dissatisfied.

"If you don't think about yourself, you should also think about the students." Qin Yu pointed to the students next to him, "They are all flowers of the motherland, and you are stinking all day long..."

"The big deal is I'll stay away from them."

"You can't bear your stinky mud so much?" Qin Yu was surprised.

"Well then, the old man will try his best to make himself less muddy."

"Okay, the soap is ready." Qin Yu stood up, "Come on, let's go back to the classroom. The teacher will teach you the chemical principles of soap making, as well as the chemical equations involved. After learning the balance of chemical equations, each It is clear at a glance how much material is suitable for use, and the soap will not be wasted when making it in the future, and the soap will be purer.”

The crowd quickly ran back to the classroom and sat upright.

And Qin Yu came in and taught them the chemical knowledge without reservation. For fear that they would not understand, he patiently explained it to them again and again on the blackboard.

Everyone has done it by themselves before, and they are more interested in learning. They study hard like a chicken blood.The memory is also stronger, and this teaching method has fully mobilized their enthusiasm.

……

Soon, school time will come.

"Have you all learned?"

"Learn!"

"Well, we'll send the soap we just made to every household now, so that they can also use this new pig pancreas soap." Qin Yudao.

One of the reasons for this is to connect with the villagers. He volunteered as a teacher in Lujia Village, and he is already a part of Lujia Village. In the future, it is very necessary to have a good relationship.

The second is to let the villagers see the power of science. In the future, if he wants to do something 'extraordinary', such as letting them grow cash crops, build roads, etc., the implementation will be smoother.

Of course, the most important thing is that he is changing the backward face of Lujia Village by doing so.

After Lujia Village, everyone used pig pancreas soap instead of the backward acacia.

It can definitely be regarded as the progress of civilization!
"Dong dong dong!" Qin Yu came to the top of the house and knocked on the door.

With a "squeak" the door opened, and the old patriarch came out, "It turned out to be Mr. Qin." After seeing Qin Yu standing in front of the students, the 80-year-old patriarch immediately saluted him.

"We're not here today for anything else, just to give you a bar of soap." Qin Yudao.

"Soap?"

"That's it." Qin Yu handed a bar of soap to him. "This thing is made of lard and plant ash. Take it back and try it. It's much better than the original acacia soap."

(End of this chapter)