"No! This can't go on like this! I had to do something. This is a protracted battle, General Li, you hold on first, and I will go to Shen Li to study a new weapon. Zhang Guanghua dropped a sentence and left quickly.

In the Zhenhua Chamber of Commerce, in a room with a plaque of "Zhenhua Craftsman College" hanging outside the door, Zhang Guanghua was explaining a drawing on the blackboard, while Liu Carpenter and other senior craftsmen were discussing in a low voice in front of a drawing. Because this "war" without gunpowder in the Chamber of Commerce is also related to the victory or defeat of the war, everyone is extremely serious.

The title of this stack of drawings reads "Five-Five Flint Pistol", but it is actually a 1620 French flintlock flintlock flintlock

"The principle of this flintlock pistol is different from that of the arquebus, everyone has used the flint, it is a tool for everyone to make fire on weekdays, we only need to hit the iron piece with the flint, we can smash the spark and ignite the gunpowder, so that the Yuan army can no longer see our movements. Everyone worked hard to thoroughly understand this drawing, first made a sample of flint, and then modified this flintlock pistol to make it completely compatible with the parts of the existing 54-style arquebus. Questions? Zhang Guanghua's speech this time was very serious.

"Nope!"

When everyone slowly dispersed, Zhang Guanghua stopped Zhao Hui, who was about to leave. It was he and Zhao Hui who had tried and tested together to burn the first kiln of cement, and he remembered that this young man's patience was very good.

"You stay, the task of this flintlock pistol is relatively simple, you won't participate, and you will do something more important with me later."

"Oh."

Seeing Zhang Guanghua holding a stack of drawings and actually pulling him to a ceramic factory outside the inner city, Zhao Hui couldn't help but wonder a little.

But what happened next made him even more depressed, Zhang Guanghua just asked him to instruct the workers of the ceramic factory to make a batch of various clay pots and different specifications of pottery pipes as required. Thinking about Carpenter Liu, who was happily developing a new weapon, he was extremely sad.

"You stay alone for a while, and I'll find a few more people." Zhang Guanghua said a word and left on his own.

Coming to the Chamber of Commerce again, Zhang Guanghua found Shen Li: "Shopkeeper Shen, didn't we recruit two alchemists when we were in Xianyou, do you know where they are working now?" ”

"I guess what you're looking for is Scar and Xuanzi, they are senior brothers, and the reason why Scar became Scar is that once the Dan furnace suddenly exploded during alchemy, and he became like that in order to protect Xuanzi. They have been making bullets and explosives at the armory factory in Kamedani now, and as soon as you ask when you go there, you will know that they are very famous and have a very recognizable face. ”

Zhang Guanghua came to Guigu to take a look, and sure enough, they were easy to find, mainly because the scar on half of Scar's face was too eye-catching. Originally, he thought that this kind of person might still have some shadows about alchemy, but he only said "Do you still want to do alchemy", and they followed. Some people's thoughts are really hard to guess.

"Ouch, Zhao Hui, that's good! I've only been out for a while, and you've made half of your mold. When he came to the ceramics factory again, Zhang Guanghua saw that Zhao Hui was really directing the craftsmen to do things, so he teased him.

Zhao Hui is better at this, no matter what his mood is, he is always very serious and meticulous in doing things, and now he needs such a person.

"Come, you stop. I'll introduce you to ......."

"No need to introduce, Scar and Xuanzi, great alchemist, who doesn't know." Before Zhang Guanghua finished speaking, he was interrupted by Zhao Hui.

Zhao Hui even got up and gave each of them a hug, and it could be seen that the relationship should be very good. But Zhang Guanghua feels that no matter how you look at it, it is a bit weird.

"Scar, you stay and do things with Zhao Hui, Xuanzi, you go buy something for me, believe me, it's only a year! I will make you the greatest alchemist in my country! Zhang Guanghua said with a proud face.

In fact, in fact, it didn't take a year for Scar and Xuanzi to become famous all over the world, becoming the most respected alchemists and alchemists in China and even the world.

Seeing the list Zhang Guanghua gave him, Xuanzi's hands trembled a little. "Green alum, saltpeter, cinnabar (mercury sulfide), sulfur, this is an important raw material for refining amalgam and huangdan!" Looking further back, "Copper, iron, charcoal, spirits, cotton, camphor, graphite, glasses, and pharmacy scales, hey, this one is a bit incomprehensible, no matter what, go buy it first." ”

Xuanzi got the list, but he didn't have time to say goodbye to Zhang Guanghua, so he left in a hurry. By the time Zhang Guanghua reached out and took out the silver from his arms, he had already seen no one.

"This ...... Is this the rhythm that is going to save me money? Zhang Guanghua muttered quietly.

"Brother Zhang, you're really here! Now that the "Patent Office" is closed, I heard from my grandfather that you will no longer go to the city wall, so I will hurry to play with you. Zhang Guanghua was thinking about money, and was suddenly pulled into reality by a crisp voice like a yellow bird.

When I looked up, I immediately muttered helplessly: "It's this trouble again." In fact, Zhang Guanghua doesn't hate Li Xinlan, and even secretly likes it, but he is very serious as soon as he works, and he doesn't want other people to disturb him, and Li Xinlan is just the one who likes to stick to him anytime and anywhere, and she is still an elf and eccentric little girl.

"Big brother wants to do things, does Sister Xinlan want to go and play with Lu Zhen?"

"No, I'm going to play with you, I'm with Zhen'er every day, I don't care about this time."

Zhang Guanghua's face was black......

After all the things were prepared, Zhang Guanghua took Li Xinlan and Zhao Hui to hire two carriages, and dragged the things back to the headquarters of the Chamber of Commerce.

So on this day, Shopkeeper Shen saw that several vacant rooms in the corner of the headquarters of the Chamber of Commerce were hung with plaques with five big characters written on them: "Alchemy Laboratory". He instantly admired Zhang Guanghua so much that he threw himself on the ground, this alchemy room is something that only the emperor can have the right to enjoy, and the face of the military advisor is very big.

"That's it, that's it, it's not right! Which bottle is facing down, not up. And that you, there are threads on the clay pipe, you connect it, stick one end in the water, yes, and cover it with a clay pipe filled with water. Ay! Who told you to put a tube in a jar, you like to plug it so much! Take it out a little. ”

"Well, that's it!" Zhang Guanghua was very pleased to see that everyone had assembled the entire set of test equipment.

Weighing two taels of green alum, Zhang Guanghua put it into a downward inclined clay tube, one end of the clay pot was connected to the U-shaped jar through cold water, and the bottom was caught with a glass. Then he carefully calculated the equation on the paper, green alum is (FeSO4?7H2O) crystal, 2FeSO4?7H2O (500 degrees of high temperature) = Fe2O3 + SO2 + SO3 + 14H2O, SO3 + 14H2O = H2SO4 + 13H2O, because part of the water can evaporate, theoretically about 10% of sulfuric acid can be obtained.

Lighting the charcoal fire and carefully controlling the temperature, Zhang Guanghua, whose face was black, collected a whole cup of dilute sulfuric acid. "You have to be careful, don't touch this water with your hands, it's very 'hot'. And your sister Xinlan, you see that my hands are so dirty, how about helping to pour me a cup of tea to drink? It proved that the clay pipe connected with threads will not leak, Zhang Guanghua was very happy, and he didn't forget to tease others after he finished his work.

Then he called two taels of saltpeter and one or two alum together with the same method of dry distillation, 2kno3 + h2so4 = k2so4 + 2hno3, theoretically up to 15% concentration of nitric acid can be obtained.

Zhang Guanghua didn't bother to calibrate the concentration, dilute sulfuric acid and dilute nitric acid could not be heated to increase the concentration at all. The reason why he made these two things in the first place was simply to verify the feasibility of chemical experiments with pottery.

"Zhao Hui, Scar, Xuanzi, come here for you to play, remember not to touch it with your hands! You can pour a little bit at a time, throw some lime, iron, copper, whatever, and have fun, as long as you stay away from me! He casually threw the collected dilute sulfuric acid and dilute nitric acid to them.

Keep tinkering.

"Hey! Why didn't you realize the importance of jewelry after 700 years? After tinkering for a while, Zhang Guanghua looked at the pile of bottles and cans in front of him, and suddenly lost his nerves.

Originally, he planned to use copper sheets and dilute nitric acid to produce nitric oxide, and then slowly pass the NO2 gas produced by mixing nitric oxide with air (oxygen) into dilute nitric acid.

In this way, theoretically, as long as there is enough time, it will always be made into fuming nitric acid. But because of God's will, first of all, the production of no is very slow, and the entire pottery pipe is leaking everywhere, and the smell is really very pungent. It's fucking infuriating.

"Why can't you find platinum in China! Oh my! Help me. If there's platinum as a catalyst, I'll do it in minutes. Why is there no platinum to make concentrated nitric acid and concentrated sulfuric acid, you have to get nitric oxide first! I hate nitric oxide! Several experiments were done in a row, all of which ended in failure, and Zhang Guanghua wanted to cry without tears.

I think that although Zhang Guanghua's chemistry grades were also very good when he was studying, he actually preferred physics, which shows how poor his patience was to do experiments.

Unexpectedly, in the end, concentrated nitric acid and concentrated sulfuric acid were made. When Zhang Guanghua's patience was exhausted, Zhao Hui, Scar, and Xuanzi came up with a way to seal all the threaded joints of all the pottery pipes with melted candles, and then found a blower for ironmaking to transport air through the pottery pipes, so they immediately made concentrated nitric acid.

When the equipment is formed, the method of making concentrated sulfuric acid is similar to the method of making concentrated nitric acid, and it can be quickly made.

Zhang Guanghua used the "lead chamber method". Sulfur is burned in a clay tube to produce SO2, then the steaming SO2 and NO are passed through a ceramic chamber together, and finally the sulfuric acid is introduced into the dilute sulfuric acid, so that 70% concentration of sulfuric acid is obtained immediately.

(3063 words)

1. Concentrated sulfuric acid: Heating of dilute sulfuric acid can slightly increase the concentration, but the maximum can only reach about 50%, and more than 75% of concentrated sulfuric acid must be generated by SO2 and platinum catalysts, or NO and SO2 gas.

3. The calibration quality of chemical experiments must be calculated by the composition of the molecular formula, and I wrote it directly according to the proportion of the item for convenience, and you won't really look at it anyway, right?