What are the properties of pure H2SO4? including physics and chemistry .

Pure sulfuric acid is a colorless, oily liquid.

Preparation of sulfuric acid. The SO2 is passed into H2O2, and there is no need to consider the H2O2 impurities too much, and the H2O2 will decompose itself to generate water and oxygen after a long time, and it only needs to be heated and concentrated after the reaction is complete; Because sulfuric acid is not volatile, it will be of higher purity.

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H2SO4 is sulfuric acid.

Sulfuric acid, with the molecular formula H2SO4, is a colorless and odorless oily liquid, a strong acid with a high boiling point and difficult to volatile, soluble in water, and miscible with water in any ratio.

Sulfuric acid is one of the most reactive binary inorganic acids that reacts with many metals. High concentration of sulfuric acid has strong water absorption, can be used as a dehydrating agent, carbonized wood, paper, cotton and linen fabrics and biological skin and other carbohydrate-containing substances. When mixed with water, a large amount of heat energy is also emitted.

Uses:

1. In the metallurgical and petroleum industry, sulfuric acid is used in the production process of non-ferrous metals to dissolve and remove other metals that are inclusional, and sulfuric acid is used to remove sulfur-containing compounds and unsaturated hydrocarbons in the petroleum industry.

2. In the textile and printing and dyeing industry, the role of sulfuric acid is also very important, in the textile industry for the production of chemical fibers is viscose silk, which needs to be mixed with sulfuric acid and other solutions as a solidification bath of viscose silk, and there is almost no need for sulfuric acid in the preparation of dyes in the dye industry.

3. In the pharmaceutical industry, sulfuric acid is used for sulfonation reaction in the preparation of sulfonamide drugs, and nitrification reaction in the preparation of the strong fungicide nitrofuracillin.

4. In agriculture, sulfuric acid can be used for soil improvement and fertilizer production. For example, sulfuric acid is used to improve the calcareous soil with a very high pH value, and the pH value of the lake water is changed.

The above content reference: Encyclopedia - Sulfuric Acid.

H2SO4 is not a reference disorder-based substance. Because the purity of sulfuric acid cannot be obtained intuitively, the specific content can only be determined by titration, which does not meet the conditions as a reference substance, so it cannot be directly used as a reference reagent.

Reference materials should meet the following requirements:

The composition corresponds strictly to its chemical formula.

The purity is high enough, the principal component content is above, and the impurities contained do not affect the accuracy of the titration reaction.

Stable in nature, for example, it is not easy to absorb moisture in the air, carbon dioxide.

and is not easily oxidized by oxygen in the air.

When participating in the reaction, it is carried out quantitatively according to the reaction formula, and no side reactions occur.

The origin of the concept of reference substance.

American standard since 1906.

Since the Bureau of Circular Science (NBS) officially prepared and promulgated the first batch of five reference materials (called standard iron samples at that time), such as cast iron and converter steel, the development of reference materials has experienced a history of nearly 100 years. As an important branch of modern metrology and an integral part of standardized technology, reference materials have gone through a long process from simple to complex, from immature to mature, constantly innovating, and constantly opening up new technical fields.

The standard material liquid quality has played a huge role in promoting the development of measurement technology, ensuring the reliability and validity of measurement results, and ensuring the comparability and consistency of analysis results between countries, departments, commodity exchanges or technical exchanges, and production process control at different times, so as to obtain great economic benefits in international development, environmental protection, people's health and safety, etc.

and social benefits.

H2SO4 is the chemical name for sulfuric acid.

Sulfuric acid is one of the more active binary inorganic strong acids, which can react with most metals. High concentrations of sulfuric acid are highly absorbent and can be used for some carbohydrate-containing substances such as dehydrating agents, carbonized wood, paper, cotton and linen fabrics, and biological skin and meat.

H2SO4 Physical Properties:

Pure sulfuric acid is usually a colorless, oily liquid with a density of g cm and a boiling point of 337 that can be separated from water in any proportion and can release a large amount of heat to boil the water.

When heated to 290, it begins to release sulfur trioxide, which eventually becomes an aqueous solution of chelating acid, which boils at 317 to become a complete azeotropic mixture. The high boiling point and relatively high viscosity of sulfuric acid is due to the strong hydrogen bonds within its molecules. Due to its large dielectric constant, sulfuric acid is a good solvent for electrolytes but not for non-electrolytes.

The melting point of sulfuric acid is that the freezing point can be reduced by adding water or sulfur trioxide.

First aid measures. Sulfuric acid contact with ** needs to be rinsed with a large amount of water, and then coated with 3% 5% sodium bicarbonate solution, and quickly seek medical attention.

Immediately after splashing into the eye, the eyelid should be lifted and rinsed thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention promptly.

After inhaling the vapor, it should be quickly removed from the scene to a place of fresh air. Keep your airways open. If you have difficulty breathing, give oxygen.

If breathing stops, artificial respiration is performed immediately. Seek medical attention promptly. After ingestion, rinse the mouth with water, give milk or egg whites, and seek medical attention quickly.

Sulfuric acid, the molecular formula is H2SO4. It is a colorless and odorless oily liquid, a strong acid with a high boiling point and difficult to volatile, soluble in water, and can be miscible with water in any ratio.

H2SO4 is the molecular formula of sulfuric acid.

Sulfuric acid is a colorless and odorless oily liquid, a strong acid with a high boiling point and difficult to volatilize, soluble in water, and miscible with water in any ratio.

Sulfuric acid is one of the important products in the basic chemical industry. It is not only used as a raw material for many chemical products, but also widely used in other sectors of the national economy.

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