Purification of coarse salt is one of the key topics in the chemistry experiment of the high school entrance examination. Li Mu still remembers that when he took the high school entrance examination, there were three questions in total, including the redox reaction of copper, the production of oxygen and the purification of coarse salt. He chose
The topic is exactly the purification of coarse salt.
In later generations, the methods that any junior high school student with a pass in chemistry could master, but in the Tang Dynasty, no one knew about it. This should be regarded as the basic welfare of time travellers. From this, it can be concluded that young people should study hard.
It’s useful, you might be able to travel through time one day.
If you learn mathematics, physics and chemistry well, you will not be afraid of traveling all over the world. This sentence is indeed true, especially after time travel, talents who learn mathematics, physics and chemistry can thrive without a system.
It is normal that even junior high school students in later generations will learn mathematics, physics and chemistry knowledge, which are basic subjects that have been compiled from the knowledge of various countries and nations after the explosion of modern science and the great integration of the world. Even one of the theorems may be
The research results of the previous generations were a great revolution at that time. After time travel, it is equivalent to bringing this revolution forward. How can it not be prosperous?
Rock salt, also called halite. It is a special kind of stone, transparent or translucent, easy to break, and looks a bit like rock sugar. It is a good partner with chloride. They were both formed tens of millions of years ago because of sea water or
It is formed by the evaporation and crystallization of lake water.
The poison of rock salt comes from its associated chlorides and sulfides.
The first step in making fine salt is to get the chloride out of the rock salt. According to the method in "Basic Operations of Junior High School Chemistry Experiments", make a qualified filter and install a set of filtering devices. Knock the rock salt out
Crush and dissolve in water. Filter out large impurities such as sediment to obtain crude brine.
The second step is the key point. Different substances have different solubilities at different temperatures. 20c, the solubility of magnesium chloride is greater than the solubility of potassium chloride and sodium chloride. Therefore, adding an appropriate amount of water to the mixture at room temperature can make it
Part of magnesium chloride is dissolved in water, so that magnesium chloride can be separated and removed. 27c. The solubility of potassium chloride is less than the solubility of sodium chloride. Add an appropriate amount of water to the remaining mixture for the second time to dissolve sodium chloride in water, thus obtaining
Crude potassium chloride. The crude potassium chloride is further crystallized and recrystallized to obtain refined potassium chloride, thereby separating potassium chloride.
What's left is a mixed liquid of sodium chloride and some sulfide.
Then go to the third step, add calcium carbonate (limestone) and alkali (plant ash) to the obtained liquid to react with the sulfide in the solution, so that the brine undergoes precipitation and purification to remove the sulfide. The liquid obtained after this step is
Pure, non-toxic salt water solution.
Finally, it evaporates and crystallizes, and what is obtained is fine salt. In the past, this was a very expensive step, but now that coal is used as fuel, it is not a problem at all.
Li Mu divided the whole process into three parts and handed them over to three families. The Changsun family learned to remove chlorides, the Dugu family learned to remove sulfides, and the Yuchi family learned how to make a complete set of instruments, including filtering devices, assembly lines, etc. The subtleties
, it requires know-how and cannot be imitated by just thinking about it.
After Li Mu finished teaching the craftsmen of Yuchi's family, it was almost noon. Li Mu did not intend to invite the guests to dinner and saw them off without ceremony.
"Master Marquis, please wait a moment!" Changsun Chong murmured a few words to his craftsmen, and then called Li Mu. Li Mu turned back to look at him and said, "What else can you do, Your Majesty? I have taught you the secret method.
Okay, you already said you won’t provide food, why isn’t it over yet? Are you relying on me?”
"It's not about food," Changsun Chong said; "Master Hou, there seems to be something wrong. My craftsman just told me that you seem to have only taught half of it. What he has learned cannot make fine salt."
After hearing this, Dugu Xiude and Yuchi Huan also hurriedly asked their craftsmen, and the answers they got were the same as Changsun Chong. Their craftsmen had only learned a part. The Yuchi family was the worst, and they had only learned a lot.
Carpentry work has nothing to do with making salt.
The three families suddenly felt like they had been deceived.
Li Mu sneered and said, "Am I not following your wishes? The three of you ignore my words and have your own thoughts. They say that the company is one, but in reality? You are making your own plans and want to get something from me.
Defrauding the secret method of making salt. Plotting against me? Just you?"
The three of them were embarrassed. Changsun Chong said: "Master Hou, we were wrong, but you agreed to the secret method, and His Majesty also gave the order. I'm afraid it's not good for you to be so perfunctory, isn't it?"
"Why am I perfunctory? I am a person who says one is one and two is two. If I say it, I will do it. I divided the secret method into two parts and taught them to you Zhangsun family and Dugu family respectively. I also
I taught the Yuchi family how to make the equipment needed to make salt. Doesn't that count as teaching?" Li Mu looked at the three of them sarcastically and said, "As long as you work together, fine salt can be made. Or, you really want to
If you know the secret method, tell each other frankly, then all three of your families will know it, and there is no need to ask me."
After saying that, Li Mu made a "please feel free" gesture, turned around and left.
The three of them were blushing, and they were all ashamed. They had already talked about this, and if they provoked Li Mu again, they would definitely fall out. The three of them left in anger. As for how they discussed it, Li Mu didn't care. If they really exchanged secret methods with each other,
It's up to them to get the complete one. Originally, Li Mu wanted to give the complete one to them. This was just to disgust them.
The three people left Zhuluhou Mansion and did not rush to go home. Instead, they came to Zhao Guogong's Mansion. They could not make the decision on what happened today. The decision had to be made by Changsun Wuji, the head of the Guanlong noble family.
After hearing the whole story, Changsun Wuji's face darkened. He glanced at Changsun Chong, sighed, and said, "Chong'er, you have disappointed my father."
The eldest grandson was dripping with cold sweat and bowed: "Father, I know I was wrong."
"Where did you go wrong?"
"This..." Changsun Chong didn't know how to answer and lowered his head.
Changsun Wuji said: "Li Mu is an outstanding person. Yuan Tiangang said that he is the reincarnation of an immortal and a man of wisdom. How can you deceive him? If you have the ability to prevent him from noticing, entering the urn is considered your ability. But you
If you don't have this ability, just be honest and don't be clever."
Although Changsun Wuji was scolding Changsun Chong, Dugu Xiude and Yuchi Huan listened as if they were scolding themselves, and they were both very embarrassed. Dugu Xiude relied on the fact that he and Changsun Wuji were of the same generation, and fought with all their might.
Duan said: "Auxiliary machine, now is not the time to scold the child. You have to make a decision. How should we deal with the matter now?"
Changsun Wuji sighed again and said: "What else can we do? According to the regulations set by Li Mu, we will build a mill along the river in the suburbs. We will start mining and making salt at the same time. We will try to complete it within three months and start selling it after the year."
."
"Auxiliary machine, I'm talking about this salt-making method..."
Changsun Wuji interrupted Dugu Xiude and said: "Brother Dugu, it is useless to talk about this matter. Who do you think among the three of us is willing to hand over the secret technique he has learned?"
One sentence stopped Dugu Xiude in his tracks.
Although the three families are all Guanlong aristocrats, the Guanlong aristocrats are originally a loose alliance. Everyone is united because of the situation, interests, etc., but they all have their own thoughts on each other.
Now that each of the three families has learned a part of the salt-making method, who is willing to take it out? I have taken it out, what will you do if you don’t take it out? I haven’t tried it, who knows whether it is true or not? If I take it out, what you take out is fake.
, am I going to be thrown out? Even if there is a contract as a guarantee, in the face of huge interests, if I can't protect it, someone will risk the explosion of the ancestral tomb and tear up the contract. It's not impossible.
Changsun Wuji was speechless when he saw Dugu Xiude, and said: "For the sake of the present, let's each perform our duties. Based on what we have learned, we will first test whether Li Mu's method of making salt is easy to use, and then talk about other things.
!”
The three of them nodded in agreement. In this situation, there was no other way.
While they were discussing, the whole city of Chang'an became lively.
The people in Chang'an City are already accustomed to getting news from Datang Daily. People who are illiterate will also gather around the "newspaper readers" in the streets and alleys to listen to him talk about the latest news in the newspapers.
There is also a newspaper reader in Xishikou. When he got the Datang Daily today, he suddenly discovered that there were actually two newspapers.
Usually there is one sheet, but rarely two. The few times so far, either when Li Mu was arrested, an additional sheet was published in order to counterattack the Shandong nobles, or when the Four Arithmetic Algorithms were introduced,
Anyway, it's always when something special happens.
There was an extra picture today, why? He looked past the first picture and looked directly at the second picture, and his eyes suddenly widened.
Many of the traders in the West Market were illiterate and came to him every day to read newspapers. Seeing his appearance from a distance, they asked what the big deal was.
"Zhuluhou is giving out money!"
"What?"/"What?"
The newspaper reader waved the newspaper in his hand and said: "Look, there are puzzles and maps here. If you find the clues, you can guess the location of the treasure. Go buy a newspaper. If you are literate, guess the questions. If you are illiterate, look at the pictures.
, It’s too late, the treasure is gone!” After saying that, the newspaper reader ran away. He had just seen that a place where clues were hidden was in the West City, and he was afraid that others would get there first.
"What baby?"/"Give me what?"
When everyone was confused, the owner of a nearby cloth shop ordered the newspaper himself. When he heard the newspaper reader shouting, he quickly picked up the newspaper and read it. When everyone saw it, they gathered around and blocked the door.
"Shopkeeper, please tell me, what kind of treasure is this? Don't run away. We can't let you out until you explain clearly!"
"Oops!" the shopkeeper stamped his feet anxiously and cursed: "Straight bitches, you guys! Come on, let me tell you, the treasure is money, at least ten coins! Whoever finds it first will be the one!"
"Shi Guan? What kind of business is that? Let's go find him!"
There are also some who are more rational and shout: "Don't listen to the wind, it is rain, it can be true!"
"It looks like you are from out of town! Let's ask who Zhuluhou is first. I'm too lazy to tell you. Let's go buy a newspaper... There is a newspaper seller over there! Newspaper seller, stop!!!"