So what is sulfuric acid? Applications of sulfuric chemicals in life Notes on use and preservation of H2SO4

In chemistry, sulfuric acid is a commonly used chemical today with special characteristics, chemical properties and applications. As an important industrial chemical, sulfuric acid is widely used to neutralize pH in wastewater treatment, and is used in fertilizer production, ore processing, chemical synthesis, and petroleum refining. …

Viewing: What is H2so4

Molecular structure of acid molecule H2SO4

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So what is sulfuric acid?

Sulfuric acid is an inorganic acid composed of the elements sulfur, oxygen and hydrogen with the chemical formula H2SO4. Sulfuric acid is a colorless, odorless and viscous liquid chemical that is soluble in water and has a highly exothermic reaction.

1. Structure of the H2SO4 molecule

The molecular formula is: H2SO4.

Structural formula of H2SO4:

The molecular model of H2SO4 is as follows:

2. Physical properties of sulfuric acid

Sulfuric acid is a liquid, slightly viscous and heavier than water, difficult to evaporate and infinitely soluble in water. Condensed sulfuric acid usually strongly attracts water and gives off a lot of heat, so when diluting, it must be slowly added to the water without doing the reverse. again, because H2SO4 can cause burns. Sulfuric acid is also capable of charring organic compounds.

3. Chemical properties of sulfuric acid

a, Dilute sulfuric acid

Sulfuric acid is a strong acid, this chemical has all the general chemical properties of acids such as:

Sulfuric acid H2SO4 changes the color of litmus to red. React with metals before H (except Pb) to form sulfate salts.

Fe + H2SO4 → FeSO4 + H2

React with basic oxides to form new salts (where the metal remains valency) and water.

FeO + H2SO4 → FeSO4 + H2O

Sulfuric acid reacts with bases to form new salts and water.

H2SO4 + NaOH → NaHSO4 + H2O

H2SO4 + 2NaOH → Na2SO4 + 2H2O

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H2SO4 reacts with salts to form new salts (where the metal remains the same valency) and new acids.

Na2CO3 + H2SO4 → Na2SO4 + H2O + CO2

H2SO4 + 2KHCO3 → K2SO4 + 2H2O + 2CO2

b, Concentrated sulfuric acid

How to dilute H2SO4

Concentrated sulfuric acid is a strong acid, a strong oxidizing agent with outstanding chemical properties such as:

Reacting with metals: When the Cu pieces are put into H2SO4, a blue solution is produced and there is a gas that comes out with a shock smell.

Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

React with nonmetals to form nonmetal oxide + H2O + SO2.

C + 2H2SO4 → CO2 + 2H2O + 2SO2 (temperature)

2P + 5H2SO4 → 2H3PO4 + 5SO2 + 2H2O

Reacts with other reducing agents.

2FeO + 4H2SO4 → Fe2(SO4)3 + SO2 + 4H2O

H2SO4 also has typical hydrophilic properties such as putting H2SO4 in a sugar beaker, after the reaction, the sugar will turn black and erupt with the following chemical equation.

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C12H22O11 + H2SO4 → 12C + H2SO4.11H2O

4. Preparation of sulfuric acid

How to prepare sulfuric acid

Normally, H2SO4 is produced by burning iron firite ore, oxidizing SO2 with oxygen under conditions of 400 – 500 degrees Celsius, diluting oleum chemical into sulfuric acid with an appropriate amount of water…

5. Forms of sulfuric acid

Although 100% sulfuric acid can be produced, it will lose SO3 at the boiling point to give 98.3% acid. Different concentrations of sulfuric acid are used for different purposes, such as:

Diluted sulfuric acid used in the laboratory is usually only 10%. Used for batteries is about 33.5%. The content of 62.18% is acid used for fertilizer production. 77.67% is used in the production tower. or glover acid.98% is concentrated acid.

6. Conductivity and polarity of H2SO4

Anhydrous sulfuric acid is a polar liquid, with a dielectric constant of about 100. This is because it can dissociate by self-protonating itself, a process known as self-protonation.

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Expression shows:

2 H2SO4 → H3SO4+ + HSO4−

Applications of sulfuric chemicals in life

Sulfuric acid is a leading chemical, widely used in the manufacturing industry as a primary raw material or catalyst. Chemical H2SO4 is used a lot in the production of fertilizers, synthetic detergents, production of chemical fibers, plastics, and paints.

Applications of sulfuric acid

1. In fertilizer production

Sulfuric acid is mainly used in the production of phosphoric acid, which is used in the production of phosphate fertilizers, and also in the production of ammonium sulfate.

2. In industrial production

Sulfuric acid is widely used in metal manufacturing processes such as copper and zinc production and in steel surface cleaning and rust removal solutions.

In addition, sulfuric acid is used to produce aluminum sulfate (e.g. paper alum). Producing sulphate salts, cleaning metals before plating, manufacturing explosives, plastics, dyes, manufacturing pharmaceuticals.

Acid and water mixtures are used as electrolytes in a variety of batteries, lead acid, etc.

Every year, there are about 160 million tons of H2SO4, which is prominent when used in manufacturing industries such as fertilizer 30%, metallurgy 2%, food products. dye 2%, plastic 5%, detergent 14%, paper, fiber 8%…

3. In wastewater treatment

Production of aluminum hydroxide is a substance used in water treatment plants to filter impurities, as well as improve the taste of water, neutralize pH in water, and used to remove Mg2+, Ca2+ ions present in wastewater

Note: Regarding the harmful effects of sulfuric acid, this is a dangerous, first-class chemical that is corrosive and causes skin blisters. Therefore, when using, should be fully equipped with specialized tools, personal respirators, masks, fume hoods when dispensing…

4. In the laboratory

Sulfuric acid is a concentrated compound used to prepare other weaker acids: HNO3. HCl in the experiment.

It is an indispensable chemical in reactions to give results and applications in other areas of life.

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Notes on using and preserving H2SO4

1. Notes when using H2SO4

When using, it is necessary to dilute sulfuric acid with water, then slowly add the acid to the water and then stir well, absolutely do not do the opposite. Gloves and glasses should be used when handling dilute H2SO4, and when in contact with concentrated acids, face shields and PVC aprons are required for maximum safety.

2. Notes on storage

Since they are a very strong acid, they should be stored away from bases and reducing agents. It is a strong corrosive even when diluted, it corrodes many metals such as iron and aluminum.

Where to buy quality sulfuric chemicals

?Where should I buy sulfuric acid?

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This is the address that sells sulfuric acid at the best price on the market. Not only that, customers also receive dedicated advice, fast professional delivery service, goods to customers as quickly as possible.

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