What is the main use of liquid soda? The role and use of liquid alkali

Common alkalis in life are sodium hydroxide, calcium hydroxide, potassium hydroxide, etc.

Sodium hydroxide is a strong alkali with high corrosiveness, generally white flakes or particles, soluble in water to form alkaline solutions, the most used sodium hydroxide is the manufacture of chemicals, followed by papermaking, aluminum, tungsten, etc.

Calcium hydroxide is a strong alkali, a white solid slightly soluble in water, which can be used to reduce the acidity of the soil, thereby playing a role in improving the soil structure. Potassium hydroxide is a colorless solid, it has many industrial and commercial uses, is used as a desiccant, absorbent, for oxalic acid and various potassium salts.

Uses of alkalis:

1. Most people are accustomed to using dish soap when washing dishes, but everyone knows that dish soap can hurt your hands, so you might as well try alkali powder, you will find that the dishes and chopsticks are very clean, and they will not hurt your hands at all.

2. There are a lot of oil stains in the kitchen, after sprinkling laundry detergent and dish soap, wipe it with a rag or can't wipe it clean, you might as well try alkali powder, and then you will find that soon the oil stains will be gone.

3. If you don't worry about the vegetables and fruits you bought, you may want to add some alkali powder when cleaning, which can effectively remove pesticide residues.

4. Many people like to eat the large intestine, but the large intestine is not easy to clean, when cleaning, use alkali powder to smear the inside of the large intestine, and then rub it, you will find that the dirty things inside will come out quickly, and the large intestine will have no taste. It's the same with alkali powder to wash pork belly.

5. After boiling water in the teapot for a period of time, you will find that there is a layer of scale on it, you may wish to use a clean rag dipped in alkali powder to scrub, you will find that the scale becomes less.

Common bases:

1. Sodium hydroxide.

Sodium hydroxide NaOH is commonly known as caustic soda.

Caustic soda, caustic soda.

Sodium hydroxide is widely used, in chemical experiments, in addition to being used as a reagent, because it has strong water absorption, it can be used to dry gases, and can also be used as alkaline desiccant.

Caustic soda is widely used in the national economy and is required in many industrial sectors. The sector that uses the most is the manufacture of chemicals, followed by oil refining, paper, aluminum, tungsten, rayon, rayon and soap manufacturing.

2. Potassium hydroxide.

Potassium hydroxide KOH is soluble in water and ethanol.

Slightly soluble in ether, soluble in water to release a lot of heat, soluble in alcohol and glycerol.

Melting point. Its chemical properties are similar to sodium hydroxide (caustic soda), and the aqueous solution is colorless, strongly alkaline, and can destroy cell tissues. It is used as a raw material for chemical production, and is also used in medicine, dyes, light industry and other industries.

3. Calcium hydroxide.

Calcium hydroxide Ca(OH)2 is commonly known as clarified lime water and slaked lime.

It can be prepared by the reaction of quicklime (i.e. calcium oxide) with water, and a large amount of heat will be released during the reaction. Calcium hydroxide is commonly used in agriculture to neutralize acidic soils, and it is also used to prepare the pesticide Bordeaux liquid. The main ingredient of triad soil and lime slurry in daily life is hydrated lime.

In addition, a clear aqueous solution of calcium hydroxide is often used in laboratory tests for carbon dioxide.

Solubility decreases with increasing temperature. Marble contains a small amount of calcium hydroxide, which is used in laboratories.

and hydrochloric acid reaction to produce carbon dioxide.

4. Lithium hydroxide.

Lithium hydroxide LiOH is a caustic alkali, solid white crystal powder or small particles, belonging to tetragonal crystalline crystals. The relative density is 471 at the melting point and 925 at the boiling point, and it begins to decompose at the boiling point and completely decomposes in 1626. It is slightly soluble in ethanol and soluble in methanol.

insoluble in ether; Due to the dissolution exothermic and the increase in the density of the solution after dissolution, the concentration of saturated aqueous solution at 288K can be reached.

5. Ammonia. Ammonia, ammonia monohydrate (NH4OH or NH3·H2O) It is an important chemical raw material and a commonly used reagent in chemical experiments, also known as gas fertilizer. (Attached:.)

The solute of ammonia is NH3) The application principle of ammonia is "one does not leave the soil, and the other does not leave the water". To not leave the soil is to cover the soil deeply; Staying water-free means diluting with water to reduce concentration, reduce volatilization, or in combination with irrigation. Since ammonia is lighter than water, care should be taken to avoid excessive local accumulation and burn the plant when irrigating.

Ammonia can be used as base fertilizer or top dressing.

The above content reference: Encyclopedia-alkali.

Alkaline liquids have a NaOH solution (sodium hydroxide.

KOH (potassium hydroxide) solution, sodium carbonate, sodium bicarbonate.

solutions, etc. 1. NaOH solution (sodium hydroxide).

Sodium hydroxide, an inorganic compound, with the chemical formula NaOH, is also known as caustic soda.

Caustic soda, solid soda, caustic soda.

Caustic soda. Sodium hydroxide has strong alkaline and strong corrosiveness, and can be used as acid neutralizer, masking agent, precipitant, precipitation masking agent, chromogenic agent, saponifying agent, peeling agent, detergent, etc., and has a wide range of uses.

2. KOH (potassium hydroxide).

Potassium hydroxide is a common inorganic base with a chemical formula of KOH and a molecular weight, and is a white powder or flake solid at room temperature. The properties are similar to sodium hydroxide, with strong alkalinity and corrosiveness, and the pH of the solution is. It is very easy to absorb moisture in the air and deliquescent, absorbing carbon dioxide.

into potassium carbonate. Soluble in about hot water, cold water, 3 parts ethanol.

Parts glycerin, slightly soluble in ether. When dissolved in water, alcohol, or treated with acids, a large amount of heat is generated.

3. Sodium carbonate.

Sodium carbonate is an inorganic compound with the molecular formula Na2CO3 and molecular weight, also known as soda ash.

But the classification belongs to salt, not alkali. Also known as soda or soda ash in international **. It is an important inorganic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze. It is also widely used in household washing, acid neutralization, and food processing.

5. Sodium bicarbonate solution.

Sodium bicarbonate, with the molecular formula NaHCO, is an inorganic salt with a white crystalline powder, odorless, alkaline, and soluble in water. It decomposes slowly in moist or hot air to produce carbon dioxide, which is heated to 270 degrees Celsius and completely decomposed. In case of acid, it decomposes strongly to produce carbon dioxide.

The functions and uses of liquid alkali are as follows:

1. Ordinary soap is a sodium salt of high-grade fatty acids, which is generally made by saponification of oil under the action of a slightly excessive liquid alkali.

2. In the printing and dyeing and textile industry, a large amount of liquid alkali should be used to remove the grease on cotton yarn and wool. Liquid soda is also required for the production of man-made fibers.

3. Liquid alkali should also be used for refined oil. To remove gum from the petroleum fraction, concentrated sulfuric acid is usually added to the petroleum fraction to cause the gum to turn into an acid residue and precipitate. The pickled oil also contains naphthenic acid, excess sulfuric acid and other acidic impurities, which can be washed with liquid alkali solution, and then washed with water to obtain refined petroleum products.

4. In the paper industry, chemical treatment is first carried out, and the raw materials containing cellulose and chemical reagents are boiled to make pulp. The so-called alkaline pulping method is to use a liquid alkali solution as a cooking liquid to remove lignin, carbohydrates and resins in the raw materials, neutralize the organic acids in them, and thus separate cellulose.

Attention should be paid to the preparation of liquid alkali standard solutions:

1. When weighing solid sodium hydroxide, it should not be weighed directly on the weighing pan or paper, but should be weighed in a small beaker with a known quality or on the watch glass; If weighed in a beaker, the sodium hydroxide solids should be transferred to the beaker before dissolving.

2. The aqueous preparation without carbon dioxide should be selected, and it should be transferred to a polyethylene bottle immediately after dissolving.

3. After cooling, the alkali lime brigade tube must be plugged with a rubber stopper.

4. After standing for 24 hours, absorb a certain amount of supernatant and dilute it to a fixed volume with water that does not contain carbon dioxide.

5. It must be stored in a polyethylene bottle. <>

What is liquid soda? Let's take a look today.

Liquid soda is a kind of sodium hydroxide, that is, liquid sodium hydroxide, also known as sodium hydroxide solution, generally pure liquid caustic soda is called liquid soda, which is a colorless and transparent liquid. Due to the different production processes of the existing chlor-alkali plants, the concentration of liquid alkali is usually 30-32% or 40-42%, in addition to sodium hydroxide, there are impurities such as sodium chloride and sodium carbonate, and sometimes a small amount of iron oxide.

Expand the trivia: what are the functions of sodium hydroxide solution

1. Chemical experiments.

In chemical experiments, the strong alkalinity of sodium hydroxide solution is often used as a solution to absorb acid gases, such as sodium hydroxide solution can absorb toxic gas sulfur dioxide, and because of its water-absorbing properties, it is used as an alkaline drying agent.

2. Production of detergents.

All kinds of soaps and soaps used in daily life are mainly prepared from sodium hydroxide, and most of the detergents such as washing clothes are also prepared from sodium hydroxide.

3. Refining petroleum.

Generally, the refined petroleum contains some acidic substances, so the petroleum should be washed with sodium hydroxide solution, and finally washed with water to obtain refined petroleum.

4. Water treatment.

In the process of sewage treatment, sodium hydroxide solution is usually used, sodium hydroxide can reduce the hardness of sewage, and as a measure of solubility, it is widely used in sewage treatment, many heavy metal ions can not be dissolved in sodium hydroxide solution, most of the heavy metal ions in sewage can be removed by using this characteristic, sodium hydroxide solution is alkaline, so it can be used to adjust the pH value of water, and neutralize the pH of wastewater.

Other Notes:

Sodium hydroxide is one of the chemicals commonly used in chemical laboratories, in chemical experiments, sometimes it is necessary to prepare sodium hydroxide solution, the bottle containing the hydroxide hole modified sodium solution must pay attention to the selection, the laboratory generally uses rubber stopper + glass reagent bottle. The reason why the glass bottle is used is because the reaction between the NaOH solution and the SiO2 in the glass at room temperature is extremely weak, and there will be no obvious change when stored in a closed glass bottle for a long time. The main reason for using a rubber stopper instead of a glass stopper is to avoid the stopper sticking to the bottle (because the mouth of the bottle fits the stopper too tightly).

The sodium hydroxide solution used in other fields is generally contained in plastic bottles, after all, glass bottles are not convenient for transportation and storage.

Alkali is one of the important raw materials of chemical Bitan, which is used in the preparation of chemicals, cleaning agents, detergents, and also used in photography and medicine. The vast majority is used in industry, and a small part is for civilian use. In industrial soda ash, mainly light industry, building materials, chemical industry, accounting for about 2 3;This is followed by metallurgy, textile, petroleum, national defense, medicine and other industries.

The glass industry is the largest consumer of soda ash, consuming tons of soda ash per ton of glass. In the chemical industry, it is used in water glass, sodium dichromate, sodium nitrate, sodium fluoride, baking soda, borax, trisodium phosphate, etc. <

1. Alkali is one of the important chemical raw materials of Yuru, which is used to make chemicals, cleaning agents, detergents, and also used in photography and medicine. Most of them are used in industry, and a small part of them are divided into civilian use.

2. In industrial soda ash, it is mainly light industry, building materials, and chemical industry, accounting for about 2 3;This is followed by metallurgy, textile, petroleum, national defense, medicine and other industries. The glass industry is the largest consumer of soda ash, consuming tons of soda ash per ton of glass.

3. It is used in the chemical industry to make water glass, sodium dichromate, sodium nitrate, sodium fluoride, baking soda, borax, trisodium phosphate, etc.

4. In the metallurgical industry, it is used as a flux in smelting and a flotation agent for mineral processing, and in steelmaking and antimony, it is used as a desulfurizer.

5. It is used as a water softener in the printing and dyeing industry. The tanning industry is used for the degreasing of raw hides, neutralizing chrome tanning and increasing the alkalinity of chrome tanning liquid.

6. It is also used in the production of synthetic detergent additives sodium tripolyphosphate and other sodium phosphate salts.

7. Edible grade soda ash is used to produce monosodium glutamate, pasta, etc.