What is Na4SiO4? Important knowledge about Na4SiO4.

1. Definition of Na₄SiO₄

Na₄SiO₄, also known as Sodium Silicate, is commonly referred to as Sodium Metasilicate in English. This compound consists of four sodium atoms (Na), one silicon atom (Si), and four oxygen atoms (O). The molecular weight of this compound is 162.11 g/mol. Its molecule is structured by a silicate ion ([SiO4]4-) and four Sodium ions (Na+).

2. Properties: Na₄SiO₄

2.1 Physical properties of Na₄SiO₄
Na₄SiO₄ often appears as a white powder, with no characteristic odor and a neutral or slightly alkaline pH.

2.2 Chemical properties of Na₄SiO₄
Na₄SiO₄ has the ability to react with acids to form silicate salts and release heat. It can also react with water to form silica and sodium hydroxide.

3. Common chemical equations of Na₄SiO₄

Na₄SiO₄ can react with acid, nonmetals, and salts. For example, it can react with hydrochloric acid (HCl) to form sodium chloride salt and silica.

4. Synthesis of Na₄SiO₄

4.1 Laboratory synthesis of Na₄SiO₄
Na₄SiO₄ can be synthesized by melting silica (SiO₂) with sodium carbonate (Na₂CO₃) at high temperatures.

4.2 Industrial synthesis of Na₄SiO₄
The main synthesis technology includes two steps: melting and releasing. In the melting process, silica and sodium carbonate are heated to high temperatures to form Na₄SiO₄. Then, Na₄SiO₄ is released at a lower temperature to remove unwanted substances.