What is the chemical property of this substance?

What are the chemical properties of this substance? I will answer with the classical Chinese body of "Tiangong Kaiwu".

If you want to know the chemical properties of a substance, you need to carefully observe its changes in various chemical reactions. If this thing encounters fire, you can see whether it burns or not, what is the state when it burns, and the color of the flame, the intensity of the smoke, whether there is any peculiar smell, and the shape of ashes are all important. If it encounters water, it is regarded as soluble or insoluble. If it dissolves, you can see the nature of its solution, or acid or alkali, and whether there are bubbles escaping. If it encounters acid, see if it has bubbles surging, whether it has color change or heat generation. In the case of lye, the same is true. < Br >
Also, if this thing comes into contact with metal, it is seen whether it has been replaced or not. Observe whether it can gradually change in the air, such as rust. Observe whether it has signs of decomposition when it is heated, and what is the cause of decomposition.

If you want to know the chemical properties of this thing, you can not only determine it based on one or two reactions, but also need to go through many tests, study the results carefully, and synthesize them. When testing, you must abide by the procedures to prevent accidents.

Only by observing its function with all kinds of things and understanding its changes under different conditions can you know the details of the chemical properties of this thing. You need patience and careful insight to get its true meaning.

What are its main uses?

"Tiangong Kaiwu" is a scientific and technological masterpiece written by Song Yingxing in the Ming Dynasty. It has a wide range of main uses and is of great significance in many fields.

In terms of agricultural production, the book contains detailed methods for planting, cultivating and managing various crops. For example, cereal planting, the sowing season, soil selection, fertilization points, etc. are carefully elaborated to provide farmers with accurate guidance, help them improve crop yield and quality, and ensure the foundation of people's livelihood.

In the handicraft industry, it has exquisite descriptions of the craftsmanship of textile, ceramics, smelting and casting industries. Taking textiles as an example, from cotton picking, bouncing, spinning to weaving, the operation process and tool use of each step are clearly recorded, which greatly promotes the inheritance and development of handicraft technology, and enables the continuation and refinement of skills.

Furthermore, in the field of machinery manufacturing, many mechanical structures and principles are recorded in the book. For example, water lifting tools overturn and barrel carts, the structure and operation mode are explained in detail, providing effective tools for water conservancy irrigation and production practice, and improving production efficiency.

"Tiangong Kaiwu" also provides precious materials for future generations to understand ancient science and technology, economy and social development. It covers a wide range of content, allowing future generations to know the production level, industrial conditions and social and economic forms at that time, laying a solid foundation for historical research.

In short, "Tiangong Kaiwu" plays a key role in agriculture, handicraft, machinery manufacturing and historical research with its rich practical content. It can be called a bright pearl in the history of ancient Chinese science and technology, and has far-reaching impact on future generations.

What are the physical properties of this substance?

The physical properties of this substance cover many aspects. In terms of its color state, it is either a solid state, with a firm texture, a certain luster on the surface, which seems to shine with a metallic texture; or it is a liquid state, showing a flowing state, like agile mercury, with a pure and clear color.

Its density is unique, and it is heavier or lighter than ordinary things. If it is heavy, hold it in your hand, and feel sinking, as if it carries the weight of the earth; if it is light, it seems to be able to dance with the wind, as light as catkins.

When it comes to hardness, or it is as solid as a rock, can resist strong impact without damage, can withstand great pressure and form as before; or it is as soft as cotton wool, easily deformed when touched, and obedient like a gentle cloud.

Solubility is also a key property. In water, or quickly dissolves, and fuses with water, just like salt enters a clear pool without a trace; or it is insoluble in water, just like oil floating on water, and it is distinct, showing a unique two-phase state.

In addition, its thermal conductivity and electrical conductivity cannot be ignored. In terms of heat conductivity, it is either a good conductor, such as hot iron, which transfers heat quickly; or a poor conductor, like heat insulation wood, which can effectively block heat flow. In terms of electrical conductivity, it can either allow current to flow unimpeded, like copper wires, to help power transmission; or excellent insulation performance, like rubber, to prevent current leakage.

This material has rich and diverse physical properties, each of which affects its application and performance in different scenarios, and is of great significance in many fields.

What is its synthesis method?

The method of synthesis of a certain method varies depending on the nature and principle of the object. Today, based on the view of "Tiangong Kaiwu", I will briefly describe it.

The synthesis of all things first shows its quality. Such as casting a sword, the quality of the sword is also iron. However, if you want to get a good sword, you need to choose fine iron. "Tiangong Kaiwu" says: "Iron is divided into raw and cooked, and it is raw when it is not fried when it comes out of the oven. If it is raw and cooked, it will be cooked when it is cooked. If it is raw and cooked, it will be steel when it is refined." This is the key to choosing materials. If you want to cast a sharp blade, you should take wrought iron and a little pig iron to get tough steel.

The second time is heavy heat. Take the burning of porcelain as an example. The formation of porcelain Where porcelain is fired, after three days and three nights, the body is red and bright, and it is moderate. "If the heat is too high, the porcelain is easy to deform and crack; if the heat is insufficient, the porcelain will be loose and the color will not be good. Porcelain burners need to watch day and night to observe the severity of the fire, adjust the amount of firewood, and control the heat to make the porcelain into a beautiful tool.

Furthermore, skills cannot be ignored. For example, in weaving, the fineness of the spinning thread and the density of the weaving warp and latitude depend on the skills of the weaver." The weaver holds the reed with his left hand, and throws the shuttle with his right hand. It is like a shuttle, interweaving the warp and latitude, and the cloth is made. "Weavers have been learning skills for a long time to make the cloth surface flat and Another example is ink making, pounding loose, mixing glue, forming and other processes, all of which require ingenious skills. "Pounding loose whiskers makes the loose smoke delicate; the proportion of mixing glue is accurate, and the ink is firm and bright."

The method of synthesis is based on excellent material selection, appropriate heat is essential, and skilled skills are supplemented. Only by having all three can things become beautiful and suitable for their use. Although the methods of synthesis recorded in "Tiangong Kaiwu" have changed over time, or have become easier, their fundamental principles can also be learned today.

What are the precautions for using this substance?

Those who use this thing should pay attention to all things.

Although this thing is wonderful, its properties and uses need to be carefully studied. The first thing to know is its texture. Whether it is pure or not depends on its effectiveness. If the texture is not good, even if it is clever and clever, it will be difficult to achieve expectations. Like the iron of a sword, if there are too many impurities, the blade will be unfavorable.

Examine its craftsmanship again. Sophisticated craftsmanship can make it good. The creation of a thing, the craftsmanship and craftsmanship are all condensed in it. Those who make it shoddily cannot be used at will. In the past, there were good craftsmen who selected materials carefully and made it in a complicated order, and their shots could be far and accurate; while poor craftsmanship, without first folding, is useless.

Furthermore, use it according to the law. Everything has its own way, and if it goes well, it will be smooth, and if it goes against it, it will be bad.

The situation of use also needs to be paid attention to. In different situations, the effect of this thing is different. Use an umbrella in the sky to block the sky; if the umbrella is used in the sun when it is empty, it may be used in the sun for too long, and the umbrella may be damaged due to high temperature.

And the user's power and mind also affect this thing. If you use too much force, it is easy to cause damage to things; if you don't use it specifically, it is difficult to do your best. Take writing as an example, if the strength of the pen is uneven, the words will be crooked; if the heart is not there, the text will not be a good product.


It is necessary to prevent its hidden dangers. Some things appear harmless, but in fact they are hidden dangers. Like the ancient poisonous wine, the appearance is no different from that of ordinary wine, and drinking it will hurt people's lives. Therefore, when using this thing, you must carefully observe, think about its advantages and disadvantages, and avoid its harm. In this way, you can make good use of this thing and achieve what you want.