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[Chemical Knowledge]：The Chemical Action and Application of Silica

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Silica is a common substance around us, also known as silica quartz. It is a colorless, odorless, non-toxic solid with high melting point and thermal stability. These physical and chemical properties give silica a wide range of applications.

chemistry:

us to understand the chemistry of silicon dioxide. Silica and hydrofluoric acid react to produce fluosilicic acid:

SiO2 + 4HF → SiF4 +2 H2O

In addition, silica reacts with carbon at high temperatures to produce carbon dioxide and silicon carbide:

SiO2 + C → SiC + CO2

In the above reactions, silica plays different roles, forming different products.

application areas:
the chemical action of
silica also makes it widely used in different fields.

1. food preservative: silica in food can absorb water, thereby extending the shelf life of food.

2. Cosmetics: Silica in cosmetics can make the product more delicate, increase the consistency and viscosity of the product.

3. Medicine: Silica also has a wide range of applications in the pharmaceutical industry, such as the preparation of capsules, tablets and other drugs.

4. Electronics industry: Silicon dioxide can be used in thin film deposition, oxide deposition and other processes in microelectronic manufacturing.

5. Building materials: Silica can be used as an additive for building materials, which can improve the strength, waterproof, and heat insulation of materials.

silicon dioxide is an important chemical substance, which has a wide range of applications in different fields. Understanding the physical and chemical properties of silica and its application fields can help us make better use of this important material and promote the development of technology, economy and society.