Correct operation of diluting concentrated sulfuric acid

Dilution of concentrated sulfuric acid is a common operating procedure. Because the density of concentrated sulfuric acid is much greater than that of water, if water is added directly to concentrated sulfuric acid, it will cause a large amount of heat release, which can easily lead to accidents and cause great harm to people. Therefore, when diluting concentrated sulfuric acid, you must strictly follow the regulations. Sulfuric acid plays a wide range of roles in various fields and plays an important role in industry and agriculture.

Correct operation of diluting concentrated sulfuric acid

The density of concentrated sulfuric acid is much greater than that of water. Directly adding water to concentrated sulfuric acid will cause the water to float on the surface of the concentrated sulfuric acid, releasing a large amount of heat and causing the acid to boil and splash out, causing an accident.

Therefore, when diluting concentrated sulfuric acid, it is often slowly injected into water along the wall of the container (the flask is drained with a glass rod) and stirred continuously to allow the heat generated by the dilution to dissipate in time. (The picture shows the operation method)

Do not reverse the order as this may cause accidents. Remember to "pour the acid into the water slowly along the wall of the container and stir constantly", "dilute the concentrated sulfuric acid, drop the concentrated acid into the water, pour it slowly along the wall of the container, and stir it with your hand. Pour the acid into the water and stir constantly. The diluted sulfuric acid should be cooled to room temperature and then stored in a reagent bottle.

What are the functions of sulfuric acid?

1. Serving agricultural production: The production of ammonium sulfate (commonly known as ammonium sulfate or fertilizer powder) and superphosphate (commonly known as superphosphate lime or calcium sulfate) used in fertilizers consumes a large amount of sulfuric acid. 2NH3+H2SO4=(NH4)2SO4 is used in the production of pesticides. Many pesticides use sulfuric acid as raw material. For example, copper sulfate and zinc sulfate can be used as plant fungicides, thallium sulfate can be used as rodenticide, and ferrous sulfate and copper sulfate can be used as herbicides. 2. Serving industrial production: used in metallurgical industry and metal processing. In the metallurgical industry, especially in the production process of non-ferrous metals, sulfuric acid is needed. In the production process of petroleum products such as gasoline and lubricating oil used in the petroleum industry, concentrated sulfuric acid is required for refining to remove sulfur compounds and unsaturated hydrocarbons. In concentrated nitric acid, concentrated sulfuric acid is used as a dehydrating agent; in the chlorine alkali industry, concentrated sulfuric acid is used to dry chlorine, hydrogen chloride, etc.; in the inorganic salt industry, sulfuric acid is used in the preparation of cryolite (Na3AlF6), borax (Na2B4O7·10H2O), trisodium phosphate (Na3PO4), disodium hydrogen phosphate (Na2HPO4), lead sulfate (PbSO4), zinc sulfate, copper sulfate, ferrous sulfate and other sulfates.