What is K2S2O6? Important knowledge about K2S2O6

1. Definition of K₂S₂O₆

K₂S₂O₆, commonly known as Potassium persulfate or Dipotassium persulfate in English, is a chemical compound. This compound consists of two potassium atoms (K), two sulfur atoms (S) and six oxygen atoms (O). The molecular weight of K₂S₂O₆ is 270.322 g/mol. The molecule of K₂S₂O₆ includes two potassium ions K+ and one persulfate ion (S₂O₈₂-).

2. Properties of K₂S₂O₆

2.1 Physical properties of K₂S₂O₆

K₂S₂O₆ typically presents as white powder, with no distinctive smell. Its pH usually ranges from 2 to 4.

2.2 Chemical properties of K₂S₂O₆

K₂S₂O₆ is a strong oxidizer. In an acidic environment, K₂S₂O₆ can transform into H₂S₂O₈, an even stronger oxidizer.

3. Common chemical reactions of K₂S₂O₆

Note that K₂S₂O₆ does not typically react with metals, acids, non-metals, or salts under normal conditions.

4. Synthesis of K₂S₂O₆

4.1 Laboratory synthesis of K₂S₂O₆

K₂S₂O₆ is usually not synthesized in the laboratory due to the complexity of the synthesis process and the need for special conditions.

4.2 Industrial synthesis of K₂S₂O₆

In the industry, K₂S₂O₆ is typically produced through the electrolysis process of KHSO₄ solution combined with H₂SO₄. Specifically, KHSO₄ and H₂SO₄ are mixed in water to form a solution, which is then electrolyzed to create K₂S₂O₆.