It is correct that barium sulfate is a white precipitate.

1.Barium sulfate is an inorganic compound with the chemical formula BaSO4.When barium sulfate is dissolved in water, it does not dissolve completely but forms a white precipitate. This is because the solubility of barium sulfate is very low, only about 2.5 mg/liter (at 20°C). Therefore, when water is added to a solution containing barium sulfate, a portion of the barium sulfate will precipitate out of the solution and form a white precipitate.

2. The white precipitation property of barium sulfate is widely used in laboratories and industries. For example, in the laboratory, barium sulfate precipitate can be prepared by mixing sodium sulfate and barium chloride in a reaction to detect sulfate ions in samples. In industry, barium sulfate is also used as filler, paint pigment, and rubber additive.

Barium sulfate is used in the following ways:

1, drilling mud aggravator: when drilling oil wells and gas wells, sometimes the weight of the mud can not be balanced with the pressure of the underground oil and gas, which results in blowout accidents. In the case of high underground pressure, it is necessary to increase the specific gravity of the mud, adding barite powder to the mud is an effective measure to increase the specific gravity of the mud.

2, paints and coatings: barium sulfate is widely used in paints as a body pigment, which plays an important role in improving the thickness, abrasion resistance, water resistance, heat resistance, surface hardness and impact resistance of the coating film. Plastic and rubber industry: Introducing part of ultrafine barium sulfate into the polymer matrix will affect its mechanical properties to a great extent.

3. Radiation cement, mortar and concrete: In these materials, barium sulfate is used for radiation protection. It can absorb X-rays and gamma rays, thus protecting the human body from radiation damage. Road construction: Barium sulfate can also be used in road construction. It can be used as a filler in road materials to improve the strength and stability of the road surface.

4, medical imaging: barium sulfate is a commonly used X-ray double contrast agent, which can be made into different ratios of suspension for individual use, but is usually used together with low-density gas to achieve the purpose of double contrast. It is commonly used for gastrointestinal imaging. Paper manufacturing: barium sulfate can be used as a paper filler to improve the optical properties and printing performance of paper.