What Is the Connection Between Sodium Carbonate and Sulfuric Acid?

Sodium carbonate [497-19-8] (Na ₂ CO ₃ ), molecular weight 105.99. Chemical purity is more than 99.5% (mass fraction), also known as soda ash, but the classification belongs to salt, not alkali . Also known as soda or soda ash in international trade. It is an important organic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glazes. It is also widely used in domestic washing, acid neutralization, and food processing.

Before artificially synthesizing soda ash, it was found in ancient times that some seaweeds contained alkalis in the ashes after being dried. After leaching with hot water and filtering, brown lye was obtained for washing. A large amount of trona comes from minerals, mainly underground or alkaline lakes. Trona exists in the sediment layer with the highest grade and is widely distributed. The earliest invention of artificially synthesized soda ash was the end of the 18th century. France Lubran reduced Glauber's salt with limestone and coal at high temperature and carbonized to obtain a crude product mainly containing Na ₂ CO ₃ -black ash. , Refining, recrystallization, and drying to obtain heavy soda ash with a purity of about 97%. In 1861, E. Solvay of Belgium invented and patented soda alone. Because technology secret protection has not been widely applied, it broke through from the United States in the 1920s, especially the famous Chinese chemical expert Hou Debang published the book "Soda ash manufacturing" in 1932, which will be kept secret for 70 years. In the world. Hou Debang also established the Hou's alkali-making method with 1939-1942 and established a pilot plant in Sichuan. In 1952, a joint alkali plant was set up in Dalian Chemical Plant. The NA method introduced by Japan Asahi Glass Co., Ltd. is essentially a compromise between hydrazine and ammonia alkali. The ratio of soda ash to ammonium chloride can be adjusted at will.

Sodium carbonate is one of the important chemical raw materials. It is widely used in light industry daily chemical, building materials, chemical industry, food industry, metallurgy, textile, petroleum, national defense, medicine and other fields. Detergents are also used in the fields of photography and analysis. Followed by metallurgy, textiles, petroleum, national defense, medicine and other industries. The glass industry is the largest consumer of soda ash, which consumes 0.2 tons of soda ash per ton of glass. Among the industrial soda ash, it is mainly light industry, building materials, chemical industry, accounting for about 2/3: followed by metallurgy, textiles, petroleum, national defense, medicine and other industries.

1. The glass industry is a large consumer sector of soda ash, which consumes 0.2t of soda ash per ton of glass. It is mainly used for float glass, kinescope glass bulb, optical glass, etc.

2. Can also be used in chemical, metallurgy and other sectors. The use of heavy soda ash can reduce the flying of alkali dust, reduce the consumption of raw materials, improve working conditions, and also improve product quality. At the same time, it can reduce the erosion of refractory by alkali powder and prolong the service life of the kiln.

3. As a buffering agent, neutralizer and dough improver, it can be used in cakes and noodles.

4. Used as detergent in wool rinsing, bath salt and medicine, alkali in tanning leather.

5. Used in the food industry as neutralizers and leavening agents, such as the manufacture of amino acids, soy sauce and noodles such as steamed bread and bread. It can also be formulated into alkaline water and added to pasta to increase elasticity and ductility. Sodium carbonate can also be used to produce MSG

6. Special reagent for color TV

7. Used in the pharmaceutical industry, as an antacid, osmotic laxative.

8. Anhydrous sodium carbonate is used for chemical and electrochemical degreasing, chemical copper plating, aluminum corrosion, electrolytic polishing of aluminum and alloys, chemical oxidation of aluminum, sealing after phosphating, rust prevention between processes, and electrolytic chromium removal Plating layer and chromium-removed oxide film, etc., also used in pre-copper, steel, and steel alloy electrolyte

9. The metallurgical industry is used as a smelting flux, a flotation agent for beneficiation, and steel and antimony as desulfurizers.

10. The printing and dyeing industry is used as a water softener.

11. The tanning industry is used for degreasing raw material skins, neutralizing chrome tanned leather and improving the alkalinity of chrome tanning liquid.

12. Baseline for calibrating acid solutions in quantitative analysis. Determination of aluminum, sulfur, copper, lead and zinc. Test urine and whole blood glucose. Analysis of co-solvents for silica in cement. Metallographic analysis of metals, etc.

Sodium carbonate junior high school

Junior high school generally requires mastering the common name of sodium carbonate (soda ash, soda), main purpose, chemical formula and some common reactions

Such as:

Special attention should be paid to sodium carbonate, although it is commonly known as soda ash, but it is actually a salt.

Sodium carbonate high school stage

In high school, it is required to grasp the differences in properties (solubility, thermal stability, alkalinity, reaction rate with acid, etc.) from NaHCO ₃ and the identification methods of the two.

Among them, the understanding of the concept of ionization and hydrolysis of strong base and weak acid salt represented by Na ₂ CO ₃ and the calculation of ionization and hydrolysis equilibrium are particularly important.