Pyridine, 3-fluoro-5-iodo-

3 - 5 - is one of the hardware, its nature is soft, blue and gray. Under normal conditions, it can be carved and shaped with a knife, and it has good ductility. It can be stretched into a thin sheet and drawn into a thin sheet. Its density is high, and it feels heavy when placed in the hand.
The melting time is not very high, 327 degrees Celsius. When encountering a fusible liquid, it is like a pool of green water. When it is cold, it will solidify again. Its boiling time is very high, 1740 degrees Celsius.
The transformation properties are determined, and it is not completely different from foreign objects. In the air, the surface is prone to slow action of oxygen, forming an oxide film. This film can prevent further oxidation of the parts to a certain extent, such as preventing the body from being oxidized.
If it is placed in dilute acids, such as dilute sulfuric acid and dilute acid, it will cause biochemical reactions. Take dilute sulfuric acid as an example, dilute sulfuric acid reacts to form sulfuric acid. Sulfuric acid is insoluble in water and covers the surface, making the reaction slow or even stop.
In the case of oxidizing acids, such as sulfuric acid and nitric acid, the reaction will be more intense. Take sulfuric acid as an example, when adding sulfuric acid, sulfuric acid reacts to generate sulfuric acid and sulfur dioxide water. The reaction of nitric acid, depending on the degree of nitric acid, generates different substances. The reaction of nitric acid is to generate nitric acid and nitrogen dioxide water; the reaction of dilute nitric acid is to generate nitric acid and nitric oxide water.
In addition, it can also generate reaction of some gold solution. For example, when you put it into a solution of nitric acid, the solution of nitric acid is placed in the solution, the color of the solution is light, and the surface of the solution is precipitated. This is all important.

"Tiangong Kaiwu" says: "All lime is burned and refined by fire. After it is finished, it will not be damaged forever if it enters the water. Hundreds of millions of boats, hundreds of millions of walls, choking gaps to prevent adultery, it must be used." Lime was widely used in ancient times, its main uses are as follows:
First, it is used in construction. After adding lime to water, it forms a lime slurry, which can be used as a adhesive for building walls. For example, when building a house, apply it between the bricks and stones to make the wall more firm and dense, and it will not fall down after years. The so-called "hundreds of millions of walls, choking gaps to prevent adultery, must be used" is the reason. Whether it is ordinary dwellings, or magnificent palaces and city walls, lime plays a crucial role, providing a solid foundation for buildings and ensuring their long-term standing.
Second, it is used in the construction of boats and boats. There are many ancient boats and boats, and lime can be used to fill the gaps in the board and prevent water leakage. "Hundreds of millions of boats" rely on lime to ensure the sealing of boats, so that boats can navigate safely in rivers, lakes and seas, providing reliable water tools for water transportation, fishing production and military operations.
Third, it is also applied in agriculture. In soil improvement, the appropriate application of lime can adjust the soil pH, improve the soil structure, and create a suitable soil environment for crop growth, thereby increasing crop yield. At the same time, lime also has a certain sterilization and disinfection effect, which can reduce the bacteria and pests in the soil and protect crops from diseases and pests.
Fourth, in the field of metallurgy, lime is also indispensable. In the smelting process, it can be used as a slag-making agent to react with gangue and other impurities in the ore to form slag, thereby separating metals and improving the purity and quality of metals, which plays an important role in promoting the development of the metallurgical industry.

If you want to know the method of synthesis of 3-nitrate and 5-nitrate, you can consider the method described in "Tiangong Wuwu". The method of chemical production is clear and good.
If the husband is 3-nitrate, or the method of powder. The method of taking the powder is often obtained from plants. For example, taking the potato, first wash the potato, remove the skin, and then crumble it into a mud. Next, soak it in water, mix it evenly, and dissolve the potato powder in water. Then use it or cloth to remove the residue. The obtained liquid is left for a long time, and the powder is settled on the bottom, and the superficial water is removed to get the powder. If you want to get dry powder, you can get dry powder in the sun, or you can bake it in the sun, and wait for the water to go away, you will get dry powder.
Until 5-nitrate, nitrate, nitric acid is also. In ancient times, nitrate was taken from the roots of the soil, the foundation of the house, etc. Because of the years and months, nitrate accumulates here. The method is to dig up the soil containing nitrate, put it in a tank, and drizzle it with water, so that the nitrate dissolves in the water. The leaching liquid, or water, can be clarified by adding substances such as water. The clear liquid is boiled in water, and the fire should not be fierce. When the water is steamed, the nitrate crystals are precipitated. If you want to get the fine nitrate, you can resoluble and re-crystallize, and reverse.
In summary, the synthesis of 3-nitrate focuses on the separation of plant raw materials; the synthesis of 5-nitrate depends on the leaching and extraction of nitrate-containing soil. The synthesis method of the two, the ancients used it for a long time, and the "Tiangong" also has its general outline, and it is also the collection of chemical industry.

The material for casting swords is important for storage and transportation. When storing, the first thing to protect is its quality. Sword materials are mostly hard materials such as fine iron, which should be placed in a dry place, protected from water and moisture to prevent rust and corrosion. If soaked in water, iron is prone to spots, which will damage its firmness, and it will be difficult to make a good weapon in the future. And the hiding place should be static and stable, and it should not be moved frequently, so as to avoid internal texture disorder caused by shock and affect the quality of the sword.
When transporting, you also need to be cautious. First, the package must be tight. Wrap it in thick felt and soft leather to prevent it from bumping on the way. The material of the sword is firm and brittle, and if it is slightly damaged, it will hurt its shape, and it may cause defects when casting the sword. Second, the handling should be gentle. Everyone works together to get up and down steadily, and should not be reckless. If you throw away the sword material, its interior may be damaged, and the appearance is difficult to detect. However, the drawbacks in the process of casting the sword are all obvious, and the sharpness and toughness of the sword are affected.
Furthermore, choosing a route for transportation is also crucial. It is advisable to choose a smooth road to avoid rough and bumpy roads. If you travel on a bumpy road, the sword materials are turbulent in the car and collide with each other. Even if the package is well packed, it is difficult to be completely intact. And you need to check it often on the way. If the package is loose and the sword material appears to be displaced, adjust it immediately to ensure that the sword material is always stable. Only in this way can you obtain the refinement of the material and cast a sharp and unparalleled sword when casting the sword.

I look at the city of 3-Jiang-5-Wat, its price is uncertain, and it often changes with time, but it can be slightly deducted.
In the river, the water flow is also, and there is a river in the land, or for the convenience of water transportation, the circulation of products is due to it.
In the city of Sri Lanka, its price is related to many things. If it is normal, people's livelihood is stable, and the city has no major movement, the price of 3-Jiang-5-Wat is about 100 gold to 300 gold. Gaijiang is a source of profit, but the wat is not in a hurry for daily use, and its price is not too high. A hundred gold is the number that everyone can omit, and three hundred gold is the value that the rich can accept.
If in troubled times, the fire is on the sky, and the people are struggling to live, the price may drop to tens of gold, or even no one cares about it. With its non-life-saving needs, everyone seeks food and security, how can they have the mind to do this.
If in a prosperous age, the culture is prosperous, everyone loves antiquities and values etiquette, the price of 3-Jiang-5-Wat may rise to five hundred gold, or even a thousand gold. Gaishi people worshiped ancient times, and they wanted this thing to show their identity and knowledge, so those with a high price were also willing to compete for it.
And if this thing has an extraordinary origin, or is given by an emperor, or through the hands of a famous sage, its price is even more unpredictable, and a thousand gold is not too much.
It is a city of 3-Jiang-5-Wat, and its price is roughly between tens of gold and a thousand gold, which varies depending on the situation and origin.