Guanidine Sulfate (2:1)

Petric acid (2:1), its use. First, it is used in metallurgical work. In the process of smelting, it can help the melting of the oil, so that the oil can be lifted, the quality of the oil can be improved, and the good materials can be used to make appliances, buildings, beams, etc., which are the main basis for construction.
Second, it is beneficial for chemical engineering. It can be used as a reverse raw material, and it can be used for multi-synthesis and synthesis. For example, it can help to determine the composition of the oil; the construction of the dye can improve the color and firmness of the dye.
Third, it is also useful for manufacturing. Applying this stone acid (2:1) to the field can reduce the acidity of the soil, make the soil suitable for planting, and be beneficial to the growth and cultivation of crops. And it can fill the missing elements in the soil, increase the disease resistance and disease resistance of crops, make the harvest of crops promising, and ensure the food supply of people's livelihood.
Fourth, it is also indispensable in the field of glass making. Adding this stone acid (2:1) can improve the physical properties of glass, such as improving the transparency and hardness of glass, making it more durable, and used in the manufacture of daily utensils, construction glass, etc., to meet the needs of the world's life.

Gypsum (2:1) is a hydrate of calcium sulfate, and its chemical composition is CaSO · 2H 2O O. This substance has many unique physical properties.
Looking at its color and shape, pure gypsum is often white, but when it contains impurities, it may appear gray, light yellow, light brown and other colors. Its shape is mostly a plate-shaped or fibrous aggregate, with a fine texture and a smooth feeling to the touch.
When it comes to hardness, gypsum has a low hardness, with a Mohs hardness of about 2, and fingernails can leave marks on its surface. This property makes it easy to carve and process, and the ancients often used it to make various exquisite handicrafts.
The density of gypsum is also not high, about 2.3g/cm ³, which is lighter than many stone materials. In terms of solubility, its solubility in water is very small, but in acid, the solubility will increase.
Furthermore, gypsum has good thermal insulation and sound insulation. Due to its porous internal structure, air is stored in the pores, and air is a poor conductor of heat and sound, it can effectively block heat transfer and sound transmission. This property makes it widely used in the construction field and is often used to make heat insulation and sound insulation materials to create a comfortable living and working environment.
In addition, gypsum will dehydrate when heated. When heated to a certain temperature, the crystalline water contained in it will gradually lose and turn into hemihydrate gypsum or anhydrous gypsum. This property is crucial in the production of building materials. For example, in the production of building gypsum powder, this dehydration principle can be used, and then water can be added to re-condense and harden, which is convenient for construction and shaping.

For those with saltpeter (two to one), when hiding, it is very important to pay attention to all kinds of things. This agent is related to all things, and there is a slight difference, or it may cause serious trouble, so the method of hiding should not be careless.
First, you must choose a dry place. Moisture is easy to invade the saltpeter agent to make it deliquescent. If it deliquescent, the medicinal power will be inaccurate, and it may change. For example, it is taboo to place it in the open air, wet in the rain, or in a humid place, where water vapor gradually seeps. When looking for a tall and dry house, place it a few feet off the ground to avoid the moisture of the earth.
Second, it is suitable for hiding in a cool place. Saltpeter is active, but it is easy to change when heated. Under high temperature, it may cause its components to decompose, or increase the risk of ignition and explosion. Therefore, it must not be placed near fire, nor in direct sunlight. Hidden in a secret room, the walls are opaque to light and heat, so as to be stable.
Third, it must be isolated from other things. Saltpeter (two to one) is unique in chemistry and can react with many substances. If it is close to flammable things, it may be careless, or cause fire; if it is placed in the same place as metal or the like, it may cause corrosion. It should be stored in a special cabinet, and the wall of the box should be thick, just in case.
Fourth, it is also important to have a special person in charge. Tibetans must understand its nature and know its risks. Those who are not good at it should not touch it easily. Daily inspection to check whether there is any change. If there is any change, we will deal with it quickly. And when the record is made, when it enters the collection and when it is checked, it must be detailed for investigation. In this way, the square-preserved saltpeter (two to one) is safe to hide and safe to use.

The preparation method of bismuth alum (2:1) is a matter of great importance to chemical technology. In the past, the method was mostly by precipitation method. The method is generally as follows:
First take an appropriate amount of bismuth salt, such as bismuth nitrate, and dissolve it in dilute acid to help it dissolve. Dilute nitric acid is often used to make bismuth hydrochloride into a uniform solution. This is because bismuth nitrate is easily hydrolyzed in water, dilute nitric acid can inhibit its hydrolysis process.
Then take an appropriate amount of alum, such as ammonium metaalfate, and also dissolve it in water to prepare a clear alum solution. When dissolved, it may need to be heated and stirred moderately to promote its complete dissolution.
Then, mix the bismuth salt solution with the alum salt solution slowly. During this process, the mixing rate and temperature need to be carefully controlled. It is usually suitable to carry out under low temperature and slow dropwise addition conditions to allow the reaction to occur smoothly and form a bismuth alfate precipitate. At the same time, constant stirring can make the reactants uniformly mixed and the reaction is more complete.
After the precipitate is formed, let it stand for a period of time to allow the precipitate particles to grow and have a denser structure. Afterwards, the precipitate is filtered with a suitable filter material, such as filter paper or membrane, to separate the bismuth alfate solids.
The filtered solid needs to be washed repeatedly with deionized water to remove the impurity ions adsorbed on the surface. After washing, it is placed in an oven and dried at an appropriate temperature to remove moisture. Or after grinding and other treatments, the required bismuth alfate (2:1) powder can be obtained.
Also prepared by hydrothermal method. In a special hydrothermal reactor, the bismuth source, alum source and an appropriate amount of solvent are mixed. Adjust the temperature, pressure and reaction time in the reactor. The high temperature and high pressure environment can promote the reaction to accelerate and the crystal growth is more orderly. After the reaction, the bismuth alfate (2:1) product can also be obtained after cooling, filtering, washing and drying. The product made by this hydrothermal method may have unique morphology and properties, which are different from the precipitation method.

Arsenic acid (2:1) is also a chemical substance. Its shadow on the environment cannot be ignored.
The application of arsenic acid to the field may have its effect at first, and it can remove the insects and reduce the crops. However, it has been in trouble for a long time.
Its sexual toxicity, which accumulates in the soil, can cause the soil to melt. Soil microorganisms survive and multiply, and arsenic acid enters, such as flooded caves, the habitat of microorganisms is destroyed, and its amount is low. Microorganisms, the soul of the soil, can transform the soil into fertilizers and fertilizers, making the soil fertile. Today, due to this damage, the soil's fertility has been lost, and the crops have also flourished.
In addition, rainwater brushes, arsenic acid flows into the water, entering rivers and lakes. Aquatic organisms are not poisoned by it. The water is not poisonous, or the water is not poisonous, or the body is infected with toxins, and people eat it, but also suffer from it. And the water is balanced, so it is difficult. Plankton such as algae die due to poison, or often proliferate, causing water to be stinky, and the water to be stinky, which is unusable.
Furthermore, if the powder of arsenic acid is in the air, people breathe it, and it is poisoned into the lungs. Coughing, burning, and life-threatening. The surrounding plants and trees are also invaded by it, and the pieces are withered and raw.
In addition, arsenic acid (2:1) has a good effect, but it will cause harm to the environment, such as hiding the blade and exposing the surface. It must be used with caution. The method of color and protection must be used to protect our great rivers and mountains, and to protect the survival of things.